Adds nake task to run all tests. Refs #25.

Should help testing the new version when it is updated.
Updates howedown and nimrod wrapper. Refs #25.
Updates enums and tests to compile and run. Refs #25.
Updates table HTML test to match v3.0.1 output. Refs #25.
Documents new math extensions. Refs #25.
Bumps version number due to API change. Refs #25.
Documents task in changes log. Refs #25.
Renames babel spec to nimble, adds intall task. Refs #25.
Updates code to work with nim compiler too. Refs #25.
Merge branch 'feature/t25_update_hoedown'