Enhanced modules base class

New type for GETPOST

Enhanced modules class documentation.

Most places and samples used editor_url so I opted for that.

So option name is easier to understand.

NEW :  workflow class deliver order if shipped totally on shipping validation

Fix : cannot add order line 

Fix Presentation of fiscal year

Fix: Warning: preg_match(): No ending delimiter '/' found

NULL by defaut. 

Create order from contract

PROJECT_DISABLE_PUBLIC_PROJECT