Proposal for a better IMCE integration

Recently, i have added imce_integrate function to IMCE, which aims to make a cleaner integration to fckeditor (or tinymce).

The old integration method requires the footer hook to detect fckeditor's state on the current page by searching the header. If it is activated and set, IMCE adds necessary javascript code to the page footer where another requirement(closure for themes) shows up.

The new method, imce_integrate function, simply adds the js code to the header and there is no special requirements.
IMCE still supports the old method for backward compatibility and noone will be affected by this patch. The only difference will be a cleaner IMCE integration for the patch users.