Make selection lists resizable.

fixes #151
Add "resize" to IE-CSS and hope for future improvements.

refs #151
Added missing developer names and email addresses in the footer and reorganized a bit the footer.inc.php page.
Increased version number to 3.1.0.
Allow to use custom path for PHP binary used for the QM.

fixes #201
Added AJAX methods that allow to retrieve image parameters as JSON objects to be used on the client side. Parameters can be either obtained from current session (i.e. current values as set by the user) or as freshly instantiated parameters. Moreover, either a specific parameter can be obtained (by name), or the whole set. The base Parameter class now has a method that allows any Parameter to be serialized to a JSON object.
The development efforts to update the microscopic parameters should branch off from the 3.1.0 version and be merged into 3.1.0 eventually. Hence, this merge to minimize differences between imgParams and 3.1.0 at this point. From now on all work on the microscopic parameters should be committed to 'imgParams' only.

Merge branch '3.1.0' into imgParams