grc: python 2.6 compatibility fix
modtool: Fixed a bug in makexml for int-type io signatures
grc: switch execute action icon to media_play
grc: renaming 'Build' menu to 'Run'

Suggested by Mike Ossmann
cmake: make sure our local CMake Modules path comes first.
cmake: fix FindUHD.cmake to first check to see if UHD installed its own version of FindUHD, and if so use it; if not, revert to current behavior.
Merge remote-tracking branch 'martin/modtool/bugfix' into maint
Fix for #647 - GUI Tabs do not switch on WX GUI Scope sink channels on OSX

With this patch, the bug is not showing anymore. It was only tested by
me on Mac OS X - not on Linux nor other platforms.
The possible regressions introduced by fix should be limited to the
notebook chooser forms only.
Merge remote-tracking branch 'skoslowski/grc_exec_icon'
Merge remote-tracking branch 'gnuradio-wg-grc/grc_rename_build_menu'
Merge branch 'maint'
cmake: use custom UseSWIG.cmake to fix parallel build issue
cmake: remove verbosity from new UseSWIG.cmake
cmake: turn off unused-but-set-variable when compiling swig generated code
grc: snap-to-grid (WIP)
grc: one preferences handler for all bools
grc: toggle action and mod1 modifier for snap-to-grid
grc: fix block height
cmake: fix typo in FindUHD.
cmake: add compiler flag only if the compiler supports it