Added code for pre-commit githook
Added code for pre-commit githook

This code checks for pep8-compliance in any committed Python source.
It will block commit until corrections are made (or the pep8
warning is overridden).

To use the githook, issue this from the repo root directory:

ln git_hooks/pre-commit .git/hooks/

widdowquinn/find_differential_primers,widdowquinn/find_differential_primers