make lint will not rerun if successful and no source files have been
changed; saves output to build/cpp_lint.log (or build/cpp_lint.error_log
on failure)
fix python/matlab wrapper bugs introduced by lint; change linter->lint
in Makefile
Merge pull request #168 from jeffdonahue/fix-lint-bugs

Fix bugs introduced by lint
Splitting source files between CUDA and CPU code.