Disable Hydrogen import/merge support by commenting out all the related bits.
Code is left intact in case anybody wants to bring it back from the dead some
day.


git-svn-id: http://svn.code.sf.net/p/rosegarden/code/trunk/rosegarden@13223 cf6a83e7-f017-4305-b0b3-678bde24f230
Update copyright notices to 2013

git-svn-id: http://svn.code.sf.net/p/rosegarden/code/trunk/rosegarden@13224 cf6a83e7-f017-4305-b0b3-678bde24f230