show skin compatibility with VLC versions

[Asim]

here's an idea i reckon we definitely should implement on the skins download page...

how bout for each skin we have a "Compatible with Version:" and go on to list the versions....

e.g. v0.8.X (for all versiosn 0.8.0 onwards)

v0.8.2+ (for 0.8.2 onwards)

etc etc...

i reckon this will help out for those folks who are downloading skins... so that they know which version the skin is compatible with

- Asim