asset 5.x-1.0-alpha1

This release is mainly development sponsored by rue89.com.

The main points are:

• Access control permissions for each asset type
• Enhanced public/private asset status, with individual role selection under private status
• Much cleaner and simple wizard interface
• Moved folder creation into an asset_type hook to take full advantage of public/private status
• By default, create a PUBLIC folder at the root asset level
• All rendered assets pass through a common theme function (theme_asset) for easy, consistent theming.
• Implemented align property in theme_asset
• asset_embed module, which extracts out the process of creating embed assets, and provides an easy mechanism for implementing new interfaces to 3rd party sites. Included are providers for youtube and dailymotion.

Thanks to Damien Cirotteau for the ideas behind this release.