upgraded framework version to 0.3.5
Merge pull request #141 from davidyan-malhar/master

upgraded framework version to 0.3.5
add log4j.properties
Merge branch 'master' of github.com:DataTorrent/Malhar
Merge branch 'master' of https://github.com/siyuanh/Malhar into siyuanh-master
few comment fixes
Checkpoint offset for kafka consumer
Merge branch 'master' of github.com:DataTorrent/Malhar