Rewrites/fixes for CURRENT_DATE, better encapsulation of redirect, coding convention:

Rewrites/fixes for CURRENT_DATE, better encapsulation of redirect, coding convention:
- loadExtension()'s parameter $ext_ver is now '0.0' by default, this saves a
  manual fix. Still all these errors needs to be fixed
- Setting CURRENT_DATE in inc/databases.php causes an error on some servers,
  thanks to km4l (www.funcoins.de) for helping me
- Redirect re-introduced, it should now no longer endless redirect and is
  required to redirect from any script to the base script
- Move setting of HTTP status '302 MOVED' into sendRawRedirect()
- if() braces added (coding convention applied)
- TODOs.txt updated