typo
enabled preview of madison requirement on the /preview page only
added switch to append /preview to open icon if status is draft
tweaked readem
added dotenv-rails gem for development convenience.
added SubmissionZipper rescue worker.

- `SubmissionZipper` is a resque worker that zip all the submissions of the challenge and notify the zip file to the requestor
- `SubmissionZipperMailer` is also added to handle notification email of SubmissionZipper
- `rubyzip` gem is added
- added Rake tasks
bug fix : when the zip file exists in S3, notification email does not include the link of zip file.
added support for java projects for thurgood
tweaked formatting
debug for submission
added some debug
reworked code submission process
added debug
added support for the current user timezone for sfdc conversion
added some code comment
added some debugging
modification to pass correct user timezone dates to sfdc
added chronic for timezone conversions
changes in sfdc timezone submission
final refactoring for date submission to sfdc with timezones