Validation Works

Following changes were made:

* Added validation on name, surname to only accept alphabetical
characters
* Added validation on Date
- Added a minimum date allowed of (now - 100 years)
- Added a maximum date allowed of (now - 10 years)
* Added ASP.NET required field validators to all controls

Login screen:
* Changed the username textbox to contain a custom placeholder asking
the user to enter the username
* Changed the password textbox to a password Textbox type.

SQL Stored Procedures:
* Changed the register User stored Procedure to add a rating with the
value of '0'

Profile:
* Changed the text area of the body of the post to expand when the
amount of characters in the post exceed 350 characters