initial commit on this branch
small fixes
fixed sending data via Arduino Bluetooth Brick
Merge branch 'arduino' of https://github.com/Catrobat/Catroid into arduino
added ArduinoReceiveBrick + ArduinoReceiveAction
deleted receive brick and changed Arduino-Receive to a function; created Arduino category (which can be enabled/disabled like the Lego bricks); changed Arduino Send Method e.g.: 13H what stands for Pin 13, set to High
-deleted the receive brick
- found an offset error @ selecting pin number
- worte simple testprogram for Arduino, activating/deactivating pins + reading their state works via my implemented functions

- bluetooth methods are pretty slow, sometimes reading a pin value immediately after setting it to H, doesn't work (more testcases needed)
reafactored arduinosendaction
refactored ArduinoSendBrick
added method to check the pin number
kicked the test function in the Arudino Send Brick for sending data when a spinner value is picked
first step in refactoring BlueTooth
Refactor for multiple BTDevices to be initialized sequentially
implemented Arduino Brick in PreStageActivity
Merge branch 'master' into bt_refactored_testing
merged master into arduino
implemented Arduino Brick in PreStageActivity
Merge branch 'bt_refactored_testing' into arduino_bt

Conflicts:
	catroid/src/org/catrobat/catroid/stage/PreStageActivity.java
	catroid/src/org/catrobat/catroid/stage/StageListener.java
fixed branch arduino
fixed error in the arduino branch; implemented Arduino Bluetooth method in PreStage class