seperating matching functions into its own module

[ericbuckley]

Description

Moving matching functions into its own module so they can be more easily reused. Keeping these functions separate, from the logic used for linkage, allows us to move forward with creating an alternative set of linkage functions using a new schema. Also, changing the syntax of the algorithm configuration for all value references that map to python functions. The new format is func:<module_path>.<function_name>, this not only makes it easy for parsing the algorithm, but also makes it transparent to the author as to where the matching code lives.

Related Issues

closes #9

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[alhayward]

Left some comments/questions, some related to future refactoring efforts.

Overall I think this does a really great job of simplifying & making the code more organized!