EHN: Email Notification work

 Add email notification for
  * new submission
  * new review
  * new comments
  * send for approval
BUG: Change OSEHRA's logo to be the right version.
EHN: Change Manage related files to Manage files
BUG: Fixed the submission license term
BUG: Add the missing parantathesis after Unselect All
EHN: Add an optional checkbox to specify source code license

 Add a metadata to make source license selection persistent

 Also display source code license information under information panel.
BUG: Remove a debug code to allow small logo display
BUG: Add certified level 4 to the Certification filter
BUG: Fixed the filter logic

 Make sure the filter logic is OR for a category
 and AND between catefories.
EHN: Add Hide Package logic

 Only hide category that has more than 10 items.
ENH: Fixed logo
Merge branch 'journal-email-notify' of github.com:jasonli2000/journal into jasonli2000-journal-email-notify
Merge branch 'jasonli2000-journal-email-notify' into journal