The installer.mac target now sets a custom background image for the .dmg and can control icon placement and window/icon size. Also turned the compression on the dmg up, and the launch daemon is placed in /Library/ rather than /System/Library/ to follow Apple's recommendations. Refs JM-767

git-svn-id: http://svn.igniterealtime.org/svn/repos/wildfire/trunk@6254 b35dd754-fafc-0310-a699-88a17e54d16e