Ticket #182 (enhancement)

The gnuradio-examples component contains a variety of subdirectories that vary in usage, completeness, and quality.

Several scripts, such as usrp_rx_cfile.py and usrp_fft.py, are not really examples, but very useful utilities that are used by many people. These and other scripts like it should be moved out of gnuradio-examples and into a new component, gr-utils, and then installed onto the user's PATH such they they can be run from anywhere.

Other scripts are directly tied to a particular gnuradio component, such as the trellis example code, and should be installed only when that package is installed (perhaps make it actually part of that package.)

Some scripts have suffered bit rot and probably should be removed altogether.

The remaining examples should install into the user's filesystem according to the LSB (/usr/share/gnuradio/examples/...)