* Forms have been revamped (CSS + javascript),
* Process has been improved : errors are displayed on the form page,
* Some changes in the index.php page so that everything related to installation is in lib/setup.php
* Also added a small function in OC_HELPER class to set input values.

All these should improve the installation process in terms of ergonomics.
Well, I do hope so.

moved help from meta navigation to 'settings' (still need a good name for it). Also, even more hip new mono icons

  * Full PHP tags
  * Alternative syntax for control structures
  * Semi-colon at the end of instructions

Start of the refactoring. Commit is quite big because I forgot to use git right from the beginning. Sorry.