Update copyright headers

Updating copyright headers in all files except py scripts under scripts. Changes made are:
"2009-2013" --> "2009-2014"
"Contact: ctb@msu.edu" --> "Contact: khmer-project@idyll.org"

A few files were missing the header, I added them.

- [ ] Is it mergable
- [ ] Did it pass the tests?
- [ ] If it introduce new functionality in scripts/ is it tested?
  Check for code coverage.
- [ ] Is it well formatted? Look at `pep8`/`pylint`, `cppcheck`, and
  `make doc` output. Use `autopep8` and `astyle -A10` if needed.
- [ ] Is it documented in the Changelog?