SM5 beta 4 version bump + url updates
Sanity checking for frame and texuture hints from filenames.
Added MaxDimensionUsesZoom to BMT copy constructor.
Use legal printf format strings when logging.
Merge pull request #306 from foresto/debfixes

Use legal printf format strings when logging.
Merge branch 'master' of https://github.com/stepmania/stepmania into updates-beta4