used_modules 6.x-1.2

- new function for creating the list of modules. Previously it was based on a native Drupal, but ultimately not well adapted to the needs of the module (this new function should be more efficient)
- page management module has been improved and clarified (adding a text for assistance in the header)
- adding the uninstall process to remove the variables created by the module
- adding a README.txt file in the package
- new feature: ability to add or not a link to the page module