Added postJson and putJson to the Service wrapper prototype

[zipang]

The first thig that i tried.... create a service wrapper for a JSON API (which API is not JSON today?) and... bingo.. it was missing..!

[cmhuynh]

I landed on the main page/documentation and encountered the issue as well.
It costed some investigation into restler source until later I found this bug.

[zipang]

Did you try my fork for that purpose ?

[cmhuynh]

My current solution is a common class that extends restler to provide
postJson and putJson.
I intended to made a small contribution back, then I found this PR, so just
comment.
I think this fix worths a review/merge, rather than a fork, in order to fix
the "first impression". The restler documentation shows an example of
postJson that does not exist.
On Sep 12, 2015 3:22 AM, "Christophe Desguez" notifications@github.com
wrote:

Did you try my fork for that purpose ?

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#212 (comment).

[easternbloc]

Could you update the docs to list the support of this method?

Can you add a simple test for coverage?

Thanks 🍭