utils: added modtool
utils: modtool now installs an example dir instead of the bz2
utils: modtool minor updates
modtool: added copyleft headers
modtool: dir template update (added list for sources)
modtool: more flexibility w/ adding and removing entries
modtool: newmod uses gr.prefs or --srcdir
modtool: bugfixes
modtool: cleanup, bugfixes
modtool: bugfix, BLOCK_MAGIC should appear before %include
modtool: fixed block_magic and %include order
Merge remote-tracking branch 'martin/grmodtool'
Merge branch 'master' into next

Conflicts:
	gr-utils/python/create-gnuradio-out-of-tree-project