Metrics backlog

[intjftw]

I'd like to clarify what metrics have been requested, and which have been done.

AST node / type level metrics:

• [x] Afferent coupling
• [x] Efferent coupling
• [x] Cyclomatic complexity (McCabe)
• [x] Bumpy road
• [x] Lack of cohesion of methods (needs to be optimized)
• [x] Parameter count of methods

File / module level metrics:

• [x] Afferent coupling
• [x] Efferent coupling
• [x] Relational cohesion

Additional tasks:

• [x] Parallel metrics calculation (partially done)
• [ ] Incremental parsing
• [ ] Test cases for each metric type (partially done)