Add board definitions to the pseudo-board selector module in the Atmel Studio integration files. Make sure all projects require the base board module, so that it appears as a top level module in the project ASF explorer for easy board switching.

git-svn-id: http://lufa-lib.googlecode.com/svn@2553 d5102386-fcda-11dd-9fdb-3debd5008f28
Fix mistakes in the board XML module file paths.

git-svn-id: http://lufa-lib.googlecode.com/svn@2554 d5102386-fcda-11dd-9fdb-3debd5008f28