Fix missing img alt attributes

.travis.yml

@@ -9,7 +9,7 @@ before_script:
 # the `install` step will run `bundle install` by default.
 script:
   - bundle exec jekyll build
-  - bundle exec htmlproofer ./_site --assume-extension --only-4xx --checks-to-ignore=ImageCheck,ScriptCheck --allow-missing-href --allow-hash-href
+  - bundle exec htmlproofer ./_site --assume-extension --only-4xx --allow-hash-href
 
 env:
   global:

docs/_clef/Overview.md

@@ -51,7 +51,7 @@ The basic premise being,
 
 The general flow for signing a transaction using e.g. geth is as follows:
 
-![image](sign_flow.png)
+![Sign flow](sign_flow.png)
 
 
 Clef relies on __sign-what-you-see__. To provide as much context as possible, 
@@ -65,14 +65,14 @@ Clef relies on __sign-what-you-see__. To provide as much context as possible,
 One setup scenario is to use virtualization, e.g. within QubesOS, where to 
 Clef is deployed on a non-networked machine (`ethvault` below)
 
-![](clef_qubes_qrexec.png)
+![Qubes](clef_qubes_qrexec.png)
 
 
 Another option is to deploy Clef on a separate physical device, e.g. USB Armory, 
 and access the CLI-UI via SSH on the interface provided by the USB ethernet 
 adapter, and expose HTTP interface via tunneling. 
 
-![](https://inversepath.com/images/usbarmory_coin_web.jpg)
+![USB armory from Inverse Path](https://inversepath.com/images/usbarmory_mark-one/usbarmory_coin_web.jpg)
 
 
 ## Multi-user setup
@@ -122,9 +122,9 @@ Enter password to approve:
 
 This is called the `internal api`, or `ui-api`. 
 
-![](clef_architecture_pt1.png)
+![Clef architecture 1](clef_architecture_pt1.png)
 
-![](clef_architecture_pt2.png)
+![Clef architecture 2](clef_architecture_pt2.png)
 
 ### Rules
 
@@ -247,13 +247,13 @@ In order to use rules, keystore passwords must be stored in `clef`. Clef uses an
 The `clef` daemon can be wrapped by an external process, which can then take
 the part of a UI. 
 
-![](clef_architecture_pt3.png)
+![Clef architecture 3](clef_architecture_pt3.png)
 QT UI on Ubuntu
-![](https://raw.githubusercontent.com/holiman/qtsigner/master/screenshot.png)
+![QT UI on Ubuntu](https://raw.githubusercontent.com/holiman/qtsigner/master/screenshot.png)
 
 GTK UI on Qubes
 
-![](https://raw.githubusercontent.com/ethereum/go-ethereum/master/cmd/clef/docs/qubes/qubes_newaccount-2.png)
+![GTK UI on Qubes](https://raw.githubusercontent.com/ethereum/go-ethereum/master/cmd/clef/docs/qubes/qubes_newaccount-2.png)
 
 ### Rules for UI apis
 
@@ -298,6 +298,6 @@ a corresponding (or exceeding) feature set:
 * EIP 191/712 - signing typed data
 
 Clef can even sign Clique headers in a private network
-![](clef_architecture_pt4.png)
+![Clef architecture 4](clef_architecture_pt4.png)
 
 

docs/_developers/Libraries-and-Inproc-Ethereum-Nodes.md

@@ -41,7 +41,7 @@ To get you hands dirty, here's a code snippet that will
 * Display some initial infos about your node
 * Subscribe to new blocks and display them live as they arrive
 
-<img src="http://i.imgur.com/LyTCCqg.png" width="512px" />
+<img src="http://i.imgur.com/LyTCCqg.png" width="512px" alt="Android in-process node"/>
 
 ```java
 import org.ethereum.geth.*;

docs/_interface/JavaScript-Console.md

@@ -72,6 +72,6 @@ In addition to the full functionality of JS (as per ECMA5), the ethereum JSRE is
 
 # Management APIs
 
-Beside the official [DApp API](https://github.com/ethereum/wiki/JSON-RPC) interface the go ethereum node has support for additional management API's. These API's are offered using [JSON-RPC](http://www.jsonrpc.org/specification) and follow the same conventions as used in the DApp API. The go ethereum package comes with a console client which has support for all additional API's.
+Beside the official [DApp API](https://github.com/ethereum/wiki/wiki/JSON-RPC) interface the go ethereum node has support for additional management API's. These API's are offered using [JSON-RPC](http://www.jsonrpc.org/specification) and follow the same conventions as used in the DApp API. The go ethereum package comes with a console client which has support for all additional API's.
 
 [The management API has its own page](management-apis).

index.html

@@ -14,7 +14,7 @@ css:
     </div>
 
     <div class="container mascot-mobile">
-      <img src="./static/images/mascot.png" height="200px" />
+      <img src="./static/images/mascot.png" alt="Geth mascot" height="200px" />
     </div>
 
     <div class="container marketing">
@@ -25,7 +25,7 @@ css:
           <p class="lead">See <a href="https://ethereum.org" target="_blank">our website</a> or <a href="http://ethdocs.org/en/latest/introduction/what-is-ethereum.html" target="_blank">read the docs</a> for more infos!</p>
         </div>
         <div class="col-md-5 hide-on-small-screen">
-          <img class="featurette-image center-block" src="./static/images/ethereum.png" height="300px">
+          <img class="featurette-image center-block" src="./static/images/ethereum.png" alt="Ethereum logo" height="300px">
         </div>
       </div>
       <hr/>
@@ -36,7 +36,7 @@ css:
           <p class="lead">See <a href="https://github.com/ethereum/go-ethereum" target="_blank">our repository</a> and <a href="./downloads">downloads section</a> for the code!</p>
         </div>
         <div class="col-md-5 col-md-pull-7 hide-on-small-screen">
-          <img class="featurette-image center-block" src="./static/images/mascot.png" height="300px">
+          <img class="featurette-image center-block" src="./static/images/mascot.png" alt="Geth mascot" height="300px">
         </div>
       </div>
       <hr/>