phpWheelForm version 1.2 released

- Bug fixed:
- treatment's error with a symbol of quote (");
- Changed:
- ChangeLog format;
- Added:
- constant of EMAIL CHARSET for every languages;
- messages for UTF-8 charset;
- Redesigned:
- Anti-double submit checker. Unique identifiers works through session handling;
- Removed:
- common.lib.php, all functions moved to main class;
- pwfbuilder, now it's only online on the project's web server;
- Documentation, now it's additional package and online on the project's web server;