Updated workflow parsing to require a properties file.  Executable loading is now done based on the provided chipathlon_bin path.

Fixed a lot of minor syntax errors.  Added missing xml closing tags.  Added validation for execute & output sites.

Added validation for making sure output / execute sites are defined in configuration.  Added new tester configuration files.

Created PegasusConfig class for loading and writing configuration data.  Specifically for handling custom sites.xml and properties.conf files.

Exclude *.pyc files when loading executables.

Closes #33

See merge request !31

Resolve "Setuptools fixes"

Closes #32

See merge request !30

Resolve "Remove module load from wrappers"

Closes #31

See merge request !29

Resolve "Update Default Params"

Closes #30

See merge request !28

Resolve "MUSIC peak caller"

Closes #24

See merge request !27