Tentative: added header to drawer which supports background image
Added toolbar to ReaderCommentListActivity
Using placeholder image for drawer header until a suitable one is found/created
Merge branch 'feature/material-appcompat' of https://github.com/wordpress-mobile/WordPress-Android into feature/material-appcompat

Conflicts:
	WordPress/src/main/java/org/wordpress/android/ui/WPDrawerActivity.java
Resolved conflicts in drawer activity