A first pass at syntax extensions
Simplified extensions implementation
Re-factored @roberocity 's twitter autolinks into extension format
Modified test runner to support extension tests as well
Added Google Prettify extension (output modification extension test)
Added header to twitter extension
Updated README
Extensions within /src are now automatically loaded to the Showdown namespace when server-side
Updated README to match previous change
Standardized naming for bundled extensions
A string name (only) can now be given for bundled extensions
Updated README with new inclusion syntax
Added documentation for authoring and testing extensions
Merge branch 'master' of git://github.com/coreyti/showdown into syntax-extensions
Added link to github page and license
Code cleanup

* Arrays used as hashes replaced by object initializer `{}` and Array
constructor calls replaced with array literal `[]`

* `function char2hex(ch)` used in email obfuscation replaced with inline
call `ch.charCodeAt(0).toString(16)`

* **For clarity I edited only src/showdown.js script. There are also
copy of file in `example` directory and minified version in
`compressed` directory.**
Merge remote branch 'tstone/syntax-extensions' into syntax-extensions
Extension autoloading fix
Merge pull request #1 from langpavel/syntax-extensions

Extension autoloading fix
Added AMD friendly piece of code.