BA: near final version

- Window is now fit to content
- Removed search button
- City txt is now validated
- Correct tootltip for cellphone & phone
- Changed RegEx for cellphone & phone to math international numbers
- Twitter URL is now / iso @
- Line up end time can not be less or the same as start time
- You can not add a stage with no name
- Fool proof => used try catch
- You cannot change stage name when you didn't select a stage
- When printing ticket the buyer will get a mail with his ticket as
attachment
- Add genres works only for exsisting bands