API:Parsing wikitext

These API modules allows to call parser for preprocessing and rendering

expandtemplates (done)

 * Returns preprocessed wikitext
 * Parameters: text=wikitext to parse, title=title used for parser ("API" by default)

render(done)

 * Returns rendered wikitext
 * Parameters: text=wikitext to render, title=title used for parser ("API" by default)

TODO: allow raw rendering