Ensure that the core USB driver source filenames are not duplicated in the LUFA_SRC_USB makefile variable of the LUFA sources build module, so that parallel builds still work.

git-svn-id: http://lufa-lib.googlecode.com/svn@2526 d5102386-fcda-11dd-9fdb-3debd5008f28
Update Studio Integration XML transform files to add top-level descriptions for each transform. Update module transform to remove spacing between modules in the generated document and to remove the unused doxygen-entry-point nodes once they have been converted into online and offline documentation nodes.

git-svn-id: http://lufa-lib.googlecode.com/svn@2527 d5102386-fcda-11dd-9fdb-3debd5008f28
Move out Studio Integration XML transform files to their own directory for neatness.

git-svn-id: http://lufa-lib.googlecode.com/svn@2528 d5102386-fcda-11dd-9fdb-3debd5008f28