Merge branch 'maint'
qtgui: fft/waterfall plot parameters are checkable and
filter: remove use of magic numbers for calculating number of taps in firdes filters.

New way uses known max attenuation values for the windows to estimate the number of taps used in a filter. This produces smaller filters but needed QA code with pre-defined values updated.
digital: HPD fixes (burst ID tags are no more propagated; buffer sizes are halved to est. max output size)
modtool: bugfixes for in-tree operation (include paths, license, cmake editing)
volk: naming error between orc file name and kernel name.

Fixes bug #583.
volk: explicitly casting tolerance to float or unsigned int for passing to fcpmare or icompare in QA tests.

On ARMs, passing tol as a float to icompare that expects an unsigned int caused improper casting. Fixes bug #582.
blocks: loosen restriction on damping factor in control_loop class.
Merge branch 'maint'
digital: updated qa_mpsk_receiver to have similar tests in test01 and test02.

This is based of and should fix issue #569.
digital: on 32-bit machines when M=4 using single-precision float was causing k=1. Using double-precision calculation here to avoid possible confusion and errors
Merge branch 'maint'
qtgui: explicitly use this pointer in constructing validators. Support for older versions of QT.
blocks: fix pdu_to_tagged_stream when saving leftover items
Merge branch 'maint'
Merge remote-tracking branch 'balister/adap'
Merge remote-tracking branch 'martin/hpd-modtool-fixes' into maint
Merge branch 'maint'
gr-uhd: add option to uhd_rx_cfile to write metadata file.
grc: use dashed lines for message connections