* modifies log messages
* adds plane model
* adds missing translation
* handles exception in contentmanager
* adds filehelper
* adds comments
* removes useless code
* renames translations
* adds padding for buffer
* clean up logger
* adds log level to config
* removes useless code
* adds comments
* adds enabled mode for processors
* adds context attributes
* adds a new bindable interface
* meshloader now creates a vertex attribute object but it is not used for now
* sets opengl 3.3 core profile
* uses vertex array objects
* adds / removes comments
* fixes mesh loader and rendering
* refactores vertices
* changes sample
* adds normals and texture coordinates to cube model
* adds missing translation
* updates sample application
Merge branch 'develop' into feature/Jython

Conflicts:
	nebula/src/main/java/de/devnetik/nebula/content/ContentManager.java
	nebula/src/main/java/de/devnetik/nebula/entitysystem/Component.java
	nebula/src/main/java/de/devnetik/nebula/util/Translator.java
	samplegame/src/main/java/de/devnetik/samplegame/Application.java
	samplegame/src/main/java/de/devnetik/samplegame/SampleApplication1.java
* fixes merge errors
* adds texture component to script