Username is saved as lowercase during sign up
Added conditionals to check usernames before lowercasing
Added tests to verify username is saved as lowercase
Merge pull request #379 from HubertChen/develop

Username is saved as lowercase during sign up.
Suggested tags feature implemented for edit page
Update the lowercase issue with the activation process
Reduce duplicate tags in suggestions.
Delete non activated accounts. Tests included

- Delete records from activations and users table
- Last login should be None
- Fixes #234
Update to declare new_username to avoid error.

- Fixes #280
fulltext updating script for readable bookmarks

- Requires updatd webtest and beautifulsoup4 to function