change name of BEAGLE to beagle-lib, as it should be and to avoid collisions with other software named BEAGLE
add Java dep for beagle-lib, remove README w.r.t. sources (add comments in easyconfigs), fix dep in MrBayes easyconfigs
Merge pull request #346 from boegel/fix_BEAGLE_name

fix BEAGLE vs beagle-lib naming + cleanup