added sampledata module, with creator (unimplemented) for creating sample data. Wrote tests for creator.
fixed errors like params in create_specified_data and setting the DIRECTORY
added test for overwrite paramter
upped n in baseline/stddev test so we are not likely to fail that test just by chance
implemented creator and function create_specified_data
Merge pull request #1 from parkin/sampleGenerator

Sample generator