moved external jars from directory "external" to "libs", also removed
from build path, since they are automatically put into build path, once
put in the "libs" dir.
exported all sensor configuration activities to be used from outside the
swan apk
Fixed bug in ContextTypedValue that caused a class cast exception when a
configuration value is non-String
Fixes, because ANTLR jar has moved
Merge branch 'master' into elie