Media GUI changes

I have complete the changes for the new media display.
If anyone has time to test it out on their phones it would help.
The code is in a separate branch in svn, at
https://svn.sourceforge.net/svnroot/bitpim/developer/skyjunky/new_ringer
I will merge into the main trunk after 0.9.0 is announced.

Main changes are:
The media is organised in the tree view by origin, there is a summary
showing all the media on the phone, allows media to be added to any origin.
New feature allowing you to move media from one origin to another
The media is stored in the database and a new folder in the filesystem, it
should automatically convert from the old storage mechanism and then delete
the old files.
Non-unique filenames are supported if the origin is different. (requires
code changes to the phone specific code to work fully, I modified the newer
verizon LGs only)
Export to folder and export to zip options added to help copy files out of
bitpim
New additional list view for media, controlled via buttons on media widgets
Date of files on phone are now preserved when they are copied from the phone
or imported from the filesystem (required change to phone code to fully
implement)
For phones that block access to ringers (vx8100) bitpim will remember the
existing file it uploaded rather than creating an empty file.
Fixed problem importing non-ascii named files, it downgrades gracefully to
ascii.
Added right click menus for media nodes in tree view.
Fix mouse wheel problem for media panels.

Simon