fixed github issue #220
fix #235, fix #236, fix #237, fix #238 instant reload, load indicator, server polling stat, empty chart options
Merge remote-tracking branch 'upstream/0.8.6-migration' into machine2
fix #230 Machine Demo - Error Handling
fixed issue #239
setting the default values in Redis Operator
Merge branch 'github-issue-220' of https://github.com/gauravgopi123/Malhar into 0.8.6-migration
Merge branch '0.8.6-migration' into 0.9-migration