Merge pull request #4 from pkra/master

added xyjax, single-file version
Merge pull request #6 from pkra/master

integrate @leathrum's extensions
Merge pull request #7 from pkra/master

add: @davidcarlisle's and @MathJax's long division extension
Added sqrtspacing extension, see https://github.com/evgenystan/sqrtspacing for details
added a minified version, readme and license
minor optimization and SVG renderer support
fixed a typo in loadComplete call
Merge pull request #8 from evgenystan/master

Added sqrtspacing extension <--- https://github.com/evgenystan/sqrtspacing
updated readme with contribution guidelines; added TODO for extension writing