Complete the docs

[jofftiquez]

The docs should be completed like

[Isaaclipse]

Hi, can you explain, I see the docs but am not sure what exactly you mean by completing the docs like the link you provided?

[jofftiquez]

@Isaaclipse this library is just a plain js version of the one provided in the link. I just want to complete the docs for every filter available in the src e.g. capitalize, date-format, currency etc. Not exactly the same with the one in the link provided but something close to that. :)