Added STEP Part 21 (ISO 10303-21) support
Remove tabs for two spaces
Change double quotes to single
Change mizar keyword definition to one string

This is mostly for consistency reasons, but it there is also compression
hinting. With this change uglify can simple turn it into one long string.
Remove execute file permissions
Change file format of oxygene to unix
Remove trailing whitespace
Merge branch 'fix/language-formatting'
Inter-relevance tuning for Ocaml/Stylus/Smalltalk.

Fixes #619.
Fix twig end tags, fixes #617
Shorter code for twig tags generation
Merge branch 'fix_twig_end_tags'
Merge branch 'master' of github.com:adamjcook/highlight.js into adamjcook-master

Conflicts:
	AUTHORS.en.txt
	CHANGES.md
	docs/css-classes-reference.rst
	src/test.html
Add detection test for step21
Merge branch 'adamjcook-master'
Get rid of template_comment css class
Adds the SML language definition