Fixed namespace

I interprete "disable=wrong package id, jars" in the packagefile

wrong package ==> i renamed namespace and package and the packagefile

jars => unknown used libraries: i added used jars to the build/extlib directory with corresponding source.txt.

note: the same extlibs are already used by org.dgtale.icsimport and org.sufficientlysecure.ical

if you meant something else with "disable=wrong package id, jars" please let me know what i have to do to make it pass