Added a single message in case a field is incorrect(to avoid confusion).
Included jquery-ui.min script and css for tooltip functionality.
Added messages for the tooltip.
Added a new method to issueCreator.js for creating a valid link to a user profile.
In register.js added function for attaching tooltip functionality to an element.
Added a validation method for the whole form that prevents submiting it in case there are errors.
For the input fields errors are now displayed on BLUR events.