* Fixed OpenEphysLib files;
* RHD2000Thread class some refactoring and stylystic fixes.

* Implemented ButtonGroupManager.
  It is responsible for positioning of buttons, any animations
  during switching, etc.
* Added MaterialButtonLookAndFeel class which implements
  flat button look and feel following Google Material Design Guidelines.

removed manual loading of all plugins, clearingout compile issues with string manipulations, adding makefile to arduiono, testsing loading