add precondition documents.
API documentatio: named id.
add precondition, cap function, multi action document.
full embed option.
remove submodule.
version bump up.
fix build error on example/api.hs.
Optionalize document of sql(apiary-persistent).
relax upeer bound of reflection.
add change log.
* Option that generate full embed documentation.
* Add precondition, rpHtml functions.