Fix linking of mbe
version 1.6.0

See
http://forums.radioreference.com/digital-voice-decoding-software/256111-
dsd-1-6-closed-fork-open-source.html#post1884783
Convert build system to use cmake and fix for Mac OS X build
Merge pull request #1 from balr0g/cmake-build-fixes

Convert build system to use cmake and fix for Mac OS X build
Fixes for ambe3600x2250 -> ambe3600x2450 rename
Use libsndfile for wav file input
Use libsndfile for wav output as well
Merge pull request #5 from balr0g/dmr-ambe+2-rename

Fixes for ambe3600x2250 -> ambe3600x2450 rename
Merge pull request #6 from balr0g/libsndfile-support

Support for wav input/output using libsndfile
Initial working DSTAR voice support
Merge pull request #7 from balr0g/dstar

Initial DSTAR AMBE voice decoding support
Updated README
Improvements to CLI input parsing and filtering
Merge pull request #8 from balr0g/readme-fixes

Updated README for dstar
Merge pull request #9 from balr0g/filtering-fixes

Filtering fixes
Add samples directory
Change CMake to properly locate required libraries
Update README
Add missing -r option from help command. Also add cmake a s a requirement in the README.
Remove samples dir, will replace with a submodule for those that want to use it