make the upload process compatible with chrome/firefox who use the MIME type 'application/octec-stream' for zip files
bug fix to stop sla triggers being abused by users setting too long slas.
need to fix the test cases later
Merge branch 'master' of github.com:azkaban/azkaban2
Merge pull request #39 from felix021/master

make the upload process compatible with chrome/firefox
Fixed typo in AzkabanWebServer
migration schedules to triggers from 2.1
Merge branch 'master' of github.com:azkaban/azkaban2
Merge changes from master.