Allow user to set static page before saving

fixes #1350
- jQuery event.preventDefault() stops the user from selecting the checkbox
Lowercase email address.

fixes #1498
Merge pull request #1489 from sebgie/issue#1466

Fix wrong error message
Merge pull request #1505 from halfdan/1498-lower-email

Lowercase email address.
Merge pull request #1353 from thgaskell/1350-static-page-checkbox

Allow user to set static page before saving
Correct the Markdown for emphasis
Merge pull request #1485 from Archanium/MinorIssues

Danish language file and a correction to Markdown modal
Merge pull request #1449 from sebgie/issue#1398

Add schema.js
Add transactions for import

closes #837
- added transaction handling for import
- added transactions to model functions