analog: fixed a few build issues against gr-analog.
analog: removing rotator from gr-analog.

Will go into gr-blocks (it's used in gr-filter). QA code is in gnuradio-core/.../filter but is not activated.
digital: fixed swig linking issue to gr-analog.
channels: adding new component gr-channels to hold channel models.

Currently, only holds our simple channel_model block.
fixing up various QA issues with new components.
analog: removed noise and sig sources from core.

Fixed QA code for components that do not use gr-analog.
Fixed QA code for new component dependencies.

constellation_receiver implements channel_model since gr-digital does not depend on gr-channels.
analog: fixing up GRC and other examples to use gr-analog for sig and noise sources.
Merge branch 'master' into next
Merge branch 'next' into next_analog
analog: moved lfsr from gr-analog to gr-digital where it is used.
blocks: fix includes to also include generated files
channels: switch to using gr-blocks
gr_fxpt_xco: inline classes, nothing to export
digital: added missing library link to analog
qtgui: fixed a few bugs under qwt6. Made checks around the symbol pointers.
Merge branch 'master' into next
Merge branch 'qtgui_stylesheets' into next

Conflicts:
	gr-qtgui/lib/DisplayPlot.cc
	gr-qtgui/lib/DisplayPlot.h
	gr-qtgui/lib/displayform.cc

Fixed some function name issues and updated qtgui examples.
qtgui: Fixed some build issues and made sure all qtgui examples work.

analog: also fixed having a default arg for noise_source seed in Python.
Merge branch 'next' of gnuradio.org:gnuradio into next