Expand Quintessence with More Stuff

[MarkOates]

This PR will:

1. Include the YAML_CPP_INCLUDE_DIR directory in the Makefile, under the objects section.
2. Add a properties section in the quintessence.md documentation.
3. Add a Blast/DirectoryCreator class
4. Add a Blast/DirectoryExistenceChecker class
5. Extend the quintessence_from_yaml program

Changes to the quintessence_from_yaml

1. Add ability for default values
2. Add sensible defaults for common dependencies
3. Automatically create directories for namespaces if they're not present