Merge pull request #22 from castomer/master

sidekiq tested ok in production
bugfix of emit unit
bugfix of sidkiq gem dependency
Merge pull request #23 from castomer/bugfix

bugfix of sidkiq gem dependency
just can use api, fixed in future
Merge pull request #24 from zerdliu/master

just can use api, fixed in future
bugfix of indicator add
sidekiq work support multi calculators for one item
Merge pull request #25 from castomer/bugfix

bugfix of indicator add
change calculator to calculation
mongodb model match new db
add download link in deploy
Merge pull request #26 from zerdliu/master

mongodb model match new db
Merge remote-tracking branch 'upstream/master'