Merge pull request #590 from nelenkov/dev

use Play Services to get OAuth token; bumped version for Alpha 9
Update gradle, android gradle plugin, and build tools to the latest versions
Remove unneeded gradle files as we use the ActionBarSherlock AAR
Merge pull request #612 from willlunniss/update-build-tools

Update build tools
Show application description and change log as html

Play Store description and change low support a subset of html tags: http://stackoverflow.com/a/18746972/239438
Merge pull request #615 from Giorgi/patch-1

Show application description and change log as html
Update gradle plugin and build tools
Setup build.gradle for signing release builds

It automatically signs them by reading keystore details from gradle.properties, and example of which is in the Andlytics Dropbox folder
Merge pull request #616 from willlunniss/build-update

Build update
Fixed PR 615

Added missing imports so it can build, ensure that new lines are preserved, and ensure that text is displayed properly in the long text dialogs
Merge pull request #617 from willlunniss/fix-615

Fixed PR 615
always enable reply to comments
Merge pull request #619 from nelenkov/dev

always enable reply to comments
temporarily disable revnue fetching, see #620; pushed as 2.6.1
Merge pull request #621 from nelenkov/dev

temporarily disable revnue fetching, see #620
first pass at parsing revenue from stats endpoint
minor cleanup
parse dev account details using JSONObject; parse and use preferred currency
Merge pull request #629 from nelenkov/dev

Parse revenue from statistics endpoint, see #620
Don't fail if UserDetails does not have a preferred currency