Merge pull request #925 from siyuanh/dt-dev

MLHR-1056 #resolve rename application to XXXXDemo convention
MLHR-1091 #resolve #comment Updating demo application names
Merge pull request #926 from sashadt/dt-dev

MLHR-1091 #resolve #comment Updating demo application names
MLHR-1092 #resolve #comment Adding environment varialbles override to application names in config.js
Merge pull request #927 from sashadt/dt-dev

MLHR-1092 #resolve #comment Adding environment varialbles override to ap...
#fix MLHR-1093
Merge pull request #929 from gauravgopi123/MLHR-1093

MLHR 1093
minor reformatting.
Merge branch 'dt-dev' of github.com:DataTorrent/Malhar into dt-dev
Changed the names of the pi demos to more meaningful names.
upgrade operator to use kafka 0.8.1.1