add some variables to enigma module so they can be imported in python.

getDistro()getImageVersionString()getBuildVersionString()getDriverDateString()
[iqon] add support.
[About] use new enigma import functions.
openvix: build 630
Merge branch 'master' of git://github.com/OpenViX/enigma2

Conflicts:
	ChangeLog
	configure.ac
	lib/python/Components/About.py
	lib/python/Screens/About.py