Ignore Android Studio related files

.idea as AS is based on IntelliJ, and .iml
Upgrade versions of gradle, gradle android plugin, and Android build tools
added up arrow navigation to action bar
Merge pull request #634 from garvankeeley/up-arrow-nav

added up arrow navigation to action bar
oops, my prev commit had debugging code to not delete reports
Merge pull request #635 from garvankeeley/uploader-debug-error

oops, my prev commit had debugging code to not delete reports
Update travis.yml build tools 19.1.0
Merge pull request #637 from garvankeeley/travis-update

Update travis.yml build tools 19.1.0
Merge pull request #633 from keverets/androidstudio

Android Studio tool update
WCDMA requires not just API level 18, but SDK 18, which Fennec doesn't support. Refactored so that MozStumbler has WCDMA in the client, and the service does not.
Merge pull request #639 from garvankeeley/wcdma-split2

WCDMA requires SDK 18, which Fennec doesn't support (yet)
Added log activity to options menu.
Switched to black UI style.
Merge pull request #640 from garvankeeley/activity-log-gui

Added log activity to options menu.
Dark Theme: Trying to address #454.
Merge pull request #646 from garvankeeley/fix-dark-style

Dark Theme: issue #454.
Fix for https://github.com/mozilla/MozStumbler/pull/639. Create the cell scanner in MainActivity startscanning, clear it on stopscanning. This is guaranteed to override the creation in the service, which creates the NoWCDMA scanner by default.
Merge pull request #647 from garvankeeley/fix-creation-of-cellscanner

Followup to #639: Fix lifespan of CellScanner
Main Activity, layout for 2.7 inch screens
Merge pull request #648 from garvankeeley/small-screens

Main Activity, layout for 2.7 inch screens
The MainActivity is acting as both a view and a controller of the entire app, separating that responsibility to the new MainApp class.
Also, I don;t like seeing instance count violations, because I have no idea if they are contributing to app crashes.
https://github.com/mozilla/MozStumbler/issues/7
After this refactor, I no longer see this issue.