Update marked.js to v0.2.8
Add configuration option for marked.js
Update marked.parser argument to include links

Marked v0.2.8 stores definition links as a property of the tokens list
returned by the lexer.
Minor lint fixes
Merge pull request #24 from johnhunter/feature/upgrade-marked-v0.2.8

Upgrade to marked v0.2.8 in order to support markdown tables