Add scheme syntax highlighting
Added G-Code (ISO 6983) support
Rewrite to be more in the style of the lisp syntax
Merge branch 'scheme' of github.com:jpverkamp/highlight.js into scheme
Begin work on inter-relevance for Lisp dialects.
Add test for br tag duplication
Fix br tag doubling
Fix .gitignore typo: node_module -> node_modules
Merge pull request #546 from seven-phases-max/master

Fix .gitignore typo.
Highlight nginx vars in urls.
Merge branch 'bug/br-doubling'

Fixes br duplication for when the tag is present but useBr is set to false.
Change if condition to prevent use of continue
Avoid doubling other void elements along with <br>.
Scheme keywords.
Unified keywords/built-ins styling for lisps.

- "keyword" is the first identifier in a list
- "built_in" is a built-in identifier
- "title" is gone
Normalized scheme.js header
Reindent scheme.js
Detection test for Scheme
Attributing JP Verkamp + noting Lisps unification in CHANGES.md
Merge branch 'scheme'