added uart driver
Merge branch 'master' of github.com:bernhardbreuss/OS
- moved bit.h to api-project
- started implementing a UART driver
-> doesn't work at the moment but i need the current project state to continue
Merge branch 'master' of github.com:bernhardbreuss/OS

Conflicts resolved:
	OS/.cproject
	OS/.project
	OS/src/main.c