add proguard config - optimizing code and delete logs
add versionName feature and build flags

remove warnings
Merge pull request #981 from Catrobat/improveGradleFeatures

add versionName feature and GSoC build flags
Drone remove wakelock permission
 - upate Android Manifest
 - update ParrotARDroneCatroidAdaptation library
Merge pull request #982 from Catrobat/drone2-DRONE-28

Drone remove wakelock permission
Drone create seperate class for drone initialisation
introduces IntelliJ Settings

- code style settings
- standard test run configuration
- dictionary
- JIRA link
- Vcs
Merge pull request #974 from Catrobat/addIntelliJSettings

introduces IntelliJ Settings
Drone add tests for seperate prestage initialisation
Merge pull request #983 from Catrobat/drone2-DRONE-26

Drone Refactor PreStaegActivity Drone initialisation
checkboxes removed after delete dialog is cancelled.
Merge pull request #984 from Catrobat/cat-853

checkboxes removed after delete dialog is cancelled.
CAT-853
fixed english translation: "Click" & "Press" --> "Tap"
fixed german translation: "Klicke" --> "Tippe"
Merge pull request #986 from Catrobat/issue#976

fixed issue #976 (localization strings)
fix DRONE-15

deactivate Drone with Feature flag
improve Gradle build Feature output
add LegoNXT build flag
fix typos
Merge pull request #989 from Catrobat/DRONE-15_drone_buildflag

DRONE-15 - buildflag
Merge pull request #811 from Catrobat/proguardConfig

add ProGuard config for Optimization and removing Logs
fixes CAT-970 and CAT-654
correct messages from server are shown
Merge pull request #965 from Catrobat/errorCodes#654

Better error messages
fixed issue #797: handle audio focus in StageActivity