CB-5346 Fix and cleanup broken Android unit test

- Found stale cordova.js in the test project. Changed ant script to copy in
  a fresh one in the pre-build stage. Removed stale copies from git, added
  to .gitignore. This is what was causing the test failure when sending
  javascript to the webview.
- Found almost-stale copy of device plugin, did the same as above.
- Fixed spacing in log messages in CordovaWebView.
- Updated README.md with current information.
- Removed dollar signs that were previously accidently appended to the license.
- Added cordova version to html pages, next to the other metadata.
- Fix incorrect separator in the viewport meta tag.
- Changed old-style <log> tag to <preference name="loglevel"> in config.xml.
- In BackButtonMultiPageTest, increased the TIMEOUT so the deviceready event
  can trigger the referenced javascript, improved the setup() method to
  explicitly load the starting point.

test/build.xml

@@ -66,9 +66,34 @@
 
 <!-- extension targets. Uncomment the ones where you want to do custom work
      in between standard targets -->
-<!--
+
     <target name="-pre-build">
+        <!-- copy in the current cordova.js file from the parent project -->
+        <copy file="../framework/assets/www/cordova.js" 
+              todir="assets/www"
+              preservelastmodified="true"
+              failonerror="true"
+              verbose="true" />
+        <!-- copy the latest device plugin from the parent's peer -->
+        <fail message="Need to have cordova-plugin-device cloned." >
+            <condition>
+                <not>
+                    <available file="../../cordova-plugin-device" type="dir" />
+                </not>
+            </condition>
+        </fail>
+        <copy file="../../cordova-plugin-device/www/device.js"
+              tofile="cordova/plugins/org.apache.cordova.device/www/device.js"
+              preservelastmodified="true"
+              failonerror="true"
+              verbose="true" />
+        <copy file="../../cordova-plugin-device/src/android/Device.java"
+              tofile="cordova/plugins/org.apache.cordova.device/src/android/Device.java"
+              preservelastmodified="true"
+              failonerror="true"
+              verbose="true" />
     </target>
+<!--
     <target name="-pre-compile">
     </target>