Added ability to run code after simulation from command line option
Reordered executation so that INIT is run before INITVALUES

This has the benefit of allowing constants to be used in INITVALUES and
allowing identification of non-species variables to prevent applying
CFACTOR.

Also added convenience function for examining rate coefficients.
Improved code parsing by adding incldue paths and special RCONST

Adding railing zeros clean up and adding PY_RCONST as a separate
captuared code segment; added pykpp's models folder as a default
include search path
Adding CHIMERE equations and promoting evaluated M over M
Adding CHIMERE chemical mechanisms
Adding CHIMERE chemical mechanisms