Add client side RSA decryption in Javascript

Move the index.html file into the template folder.  Reorganized the page a little bit. 

Work Flow:
1) login as admin
2) Go to the admin page to upload a default key or upload a key for a user.
3) logout
4) login as normal user
5) upload a csv file to be encrypted with the default key or the user key.
6) Get all files for the user. Find a file key in the result box.
7) Get the file content with the file key.
8) Fill out the "encrypted column", "delimiter" and "hasHeaderRow" boxes and click on "decrypt"
9) Decrypted file content displayed in the result box.