Norwegian translation and and a XSS bug fix ++

[thnilsen]

Dear Benjamin,

I have added a few updates to the current develop branch that might be of interest to others...

• Norwegian translation to the code
• Fix XSS bug
• Fix email formatting bug when using non english characters.
• Updated the IP Whitelist feature as suggested in pull request #49, but with the recommended changes you requested.
• Added option to display remaining time/views on viewing of secrets

Regards, Thomas