Fix bug : #334
Tracking dashboard info #328
Refactor a bit
Enable decide download dir
Use "jpg" for output file instead of "jpeg"
Support 'download-on-screenshot'
Enable to set download dir name
Merge pull request #338 from otiai10/wip/download

Wip/download
Add ajax loader
[sync] 0.9.2.0
Merge pull request #337 from otiai10/develop

[sync master] 0.9.2.0