Add .idea folder to .gitignore
Basic extractor classes and parse function

Very basic implementation of the parse API function
which iterates through all Extractor subclasses and
extracts the dates from the text and returns a list of these dates.

Has a christmas extractor which extracts words like
christmas and christmas eve.

Includes test cases for all code.
Add requirements.txt file

Add nosetests and coverage packages.
testcases can be run with the following command:
nosetests --cover-html --cover-html-dir=htmlcov --with-coverage

Add env and htmlcov folders to .gitignore file.
Add travis-ci yml config

Trying out running of testcases on travis-ci.org