make the upload process compatible with chrome/firefox who use the MIME type 'application/octec-stream' for zip files
change vm page per issue 46
Fix Bug: Timezone default settings doesn't work
Fixed typo in JobTypeManager.java
Merge pull request #62 from Erwa/master

Fixed typo in JobTypeManager.java
logs from different jobs may appear in the same log file due to Layout thread safety issue.
Using EnhancedPatternLayout for each and every job  should fix this.
Merge branch 'master' of github.com:azkaban/azkaban2
Merge pull request #61 from pooorman/master

Fix Bug: Timezone default settings doesn't work
Add comments to trigger package.
Merge pull request #63 from davidzchen/add_comments_trigger

Add comments to trigger package.
fix bug when executionOptions is null, scheduled items skip execution
fix bug when executionOptions is null, scheduled items skip execution
Merge branch 'master' of github.com:azkaban/azkaban2
Bump d3.js from v2 to v3.
Improve breadcrumbs on executing flow page, flow page, job history page, and job log page.
Merge pull request #64 from davidzchen/bump_d3_version

Bump d3.js from v2 to v3
Merge branch 'master' into fix_breadcrumbs
Style changes in some JS views.
Move hasClass, addClass, and removeClass to azkaban.common.utils.js.
Clean up breadcrumbs on job page and job history page.