#64 Fix documentation

[Peter Walker]

Bring the documentation up to date, including new
functions... check all function reference information
is correct.

[ZeRoRaVeN]

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This should be a collaborative group effort. It's too much
work for one person, and since the SDK is constantly updated
it's a really big problem.

A system should be implented so that users can select which
function they're going to check and when they completeing
checking it over. :-/

[Nobody/Anonymous]

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Why dunnot generate the doc with php Doc ?