runtime: fix for thread safety issue during simultaneous use of stream tags and performance counters
runtime: forgot to go back to the 'old' style using gruel.
utils: fix modtool template output signature
modtool: fixed some setup for noblock gen.
wxgui: make dummy set_callback stub in nongl sinks.

Doesn't work, but also doesn't break the code.
modtool: fix typo in help string
Packaging work

* Added missing wxgui Python OpenGL dependency
* Added Ubuntu 13.04 support
filter: fix pfb_arb_resampler XML for I/O types
Merge remote-tracking branch 'ncorgan/packaging_work' into maint
qtgui: init FFT Size box for QTGUI sink to the right FFT value. Issue #542.
grc: remove "c" key shortcut for create heir action
modtool: Fixes for intial templates of a block.

1. adds '$' to args in the GRC xml <make> tag.
2. sets <+ITYPE+> and <+OTYPE+> for all I/O data types in io_signature and in work functions to be more clear what needs modification.

Conflicts:

	gr-utils/src/python/modtool/templates.py
Update revision to 3.6.4.2.
Merge branch 'v3.6.4_branch' into v3.6.4git_gras_support