blocks: moved transcendental block to gr-blocks.
modtool: another fix in the SWIG generating code
Merge branch 'master' of git://github.com/gnuradio/gnuradio into grmodtool
Merge remote-tracking branch 'mbant/grmodtool'
blocks: fixed typo.
core: adding a mutex as a protected member of gr_block for use in protecting set and work function access to variables.

This is used in gr-analog's noise_source and gr-filter's fir_filter_XXX since these two cause particular problems (in next's channel model). This shows the use of the mutex for general protection when needed.
cmake: adding Boost version 104601 to list of bad Boosts.
Merge branch 'maint'
Update maintenance release version to 3.6.3.1
Merge branch 'maint'

Use merge strategy -s ours to skip release commits.
Update release version to 3.6.4
Update version to 3.6.5git
blocks: moving unpack_k_bits to gr-blocks.
blocks: moved pack_k_bits to gr-blocks.