Merge pull request #11 from gmccoy/master

Main ucpp script can't find command scripts on some systems
Quote cd "$HOME/.ucpp"
Fix more unquoted paths
Update Linux dependencies
Fix unquoted paths in global settings file
Allow installing gccdist to alternative location
Disallow installing gccdist in path with spaces

The WindRiver-style makefiles do not work if the compiler path contains
spaces. For not, disallow such installs.
Fix detecting if gccdist is installed
Made C++ file search recurse into subdirectories