Reduce news toast download & show frequency.
v3.0.2
Updated dialog_whatsnew.xml with additional feature.
Preference activity:  Ask for rating and for feedback.
WIP: Building about dialog.
Tidy the about dialog.
Add "What's New" to overflow menu.
Merge branch 'master' into integrated-reader.
Tidy main action bar.

Conflicts:
	res/menu/activity_main.xml