re-theme action bar

action bar background is completely transparent as far as the
overarching theme is concerned, and this is what ptr looks at. each
activity then sets it's action bar's activity to the appropriate (light
or dark) transparent theme drawable with a color filter applied to
change the holo blue "separator" line in the drawable to whatever the
accent color is. since ptr uses the fully transparent action bar from
the theme, this "separator" "disappears" when the ptr is in a loading
state, then "reappears" once finished
add initial text scaling, fix RoR post clear bug
Version 0.3.25

Version 0.3.25
Added text scaling which can be set in settings, under the "Theming"
category - can be set anywhere in between 80% and 120%, inclusive
Changed dark theme's action bar style back to transparent
Made action bar style in all settings activities and the about activity
obey accent color
Fixed bug where post interface would be cleared when resuming app when
Reload on Resume was enabled
Other minor bug fixes