upgrade to android gradle plugin 0.9
Merge pull request #1059 from wordpress-mobile/issue/upgrade-to-android-gradle-plugin-0.9

upgrade to android gradle plugin 0.9
remove useless dialog in SelectCategoriesActivity
Merge branch 'develop' into issue/1013-replace-refresh-icon-by-pull-to-refresh

Conflicts:
	build.gradle
Move WebView method call back to the main thread. Fixes #1057.
Also compare postId in postsListMatch, because the postId can change if the user refreshes the posts list. Fixes #1058.
Remove some srcDirs to fix issues in Android Studio after 0.5.0 update.
Coding style: Use != comparisons. #brainfart
Merge pull request #1062 from wordpress-mobile/issue/1058-post-selection-error

Posts list/selection fixes
Merge branch 'develop' into issue/1013-replace-refresh-icon-by-pull-to-refresh
fix capitalization
fix empty notification list PTR
fix PTR empty view for Posts and Pages
fix PTR empty view for MediaBrowser