- added base for general settings tab with 3 checkboxes (temp layout. Will improve in a later stage)
- double tapping a file unlocks/locks it
Merge pull request #206 from AlexKolpa/204-205-doubletap-settings-selection_icon

Double tap & settings tab
Update gradle files ignores new build files

Gradle files have been updated through the upgrade tools in Android
Studio.

.gitignore has been updated to exclude new build files.
Merge pull request #211 from AlexKolpa/210-gradle-update

Update gradle files ignores new build files
Merge remote-tracking branch 'origin/master' into 154-action-item-implementation

Conflicts:
	AndroidStealth/src/main/java/content/ContentFragment.java
WIP