added font support overview
updates to font-support
first commit for fixing issue #34
Merge pull request #49 from pkra/v2.4-latest

V2.4 latest
Merge pull request #50 from pkra/issue29

adding page about font support
more udpates to installation.rst
merge v2.4-latest
Merge pull request #53 from pkra/issue34

Issue34
document processRefs option in tex2jax.rst
Merge pull request #55 from pkra/issue5

Fixes Issue5
added: toMathML documentation
Merge pull request #58 from pkra/issue54

toMathML documentation. Fixes #30.
added: third party repository docs
merge 2.4-latest back in
fixing code snippets; thx @dpvc
Merge pull request #59 from pkra/issue3

Resolve #54