Creating an sql file for installation purpose.

The version specific sql files will be used for upgrade purpose.
Declaring the variable AppVersion in the install app.
Adding code to display the start and configuration page of install app.

In start page we display the licence and in configuarion page we
display the form for user to enter db details and account details.
Styling the start and configuration pages of install app to display the continue buttons.
Merge remote-tracking branch 'upstream/v1.0' into v1.0

* upstream/v1.0:
  Styling the start and configuration pages of install app to display the continue buttons.
  Adding code to display the start and configuration page of install app.
  Declaring the variable AppVersion in the install app.
  Creating an sql file for installation purpose.