rake spec clean under RubyMotion 2.0
verified that timestamp-properties bug is not yet fixed
Merge remote-tracking branch 'upstream/master'
Merge branch 'master' into RM2.0
BW doesn't need .osx now for RM2.0; must clean up after tests
Merge pull request #35 from jmay/master

RubyMotion 2.0 support & Version bump to 1.4.0