(CFACT-39) CMAKE should work with boxen installed homebrew

Currently if you have installed boxen and are using homebrew through that
facility, attempting to build cfacter results in much drama in the lands.
However this appends those specific search paths for boxen/homebrew to both
`CMAKE_LIBRARY_PATH` / `CMAKE_INCLUDE_PATH`. And there was much rejoicing...
Merge pull request #64 from ferventcoder/ticket/master/CFACT-39-cmake-boxen

(CFACT-39) CMAKE should work with boxen installed homebew