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How to check code style compliance for C++:
  ./cpplint.py problem4/*

How to build:
  1. Install google-test framework, cmake, dev libs for pthread and boost.
     For google-tests, see http://askubuntu.com/questions/145887/why-no-library-files-installed-for-google-test-on-12-04
  2.
    mkdir build
    cd build
    cmake ..
    make
  3. To run tests:
    ./p4 --tests

How to run:
  ./p4 "18:30" dms mechanical
  ./p4 "10:00 pm" deg quartz
  ...