build: create and install a config.h so external projects can know what we built with.
build: install our cmake modules into share/gnuradio/cmake/Modules.
blocks: added includes necessary for Windows compilation
prefs: pass strings by reference. Also cleans up a comma in gr_modtool that made a string into a tuple (and C++ angry).
prefs: pass strings by reference. Also cleans up a comma in gr_modtool that made a string into a tuple (and C++ angry).
Merge branch 'maint'