only enable content-type dropdown when there is an http request body
comments
comments; add getoption() and availableoptions() methods; fix setproxyuser
do not thow when setoption() is used on non-existing option (backward compat)
Allow rest calls working with eZP v2 api (more flexible content-type mgmt)
allow user to set ACCEPT in debugger
Allow debugger user to set request content-type by hand
Add some notes about payload content-type in debugger
Add example files to interact with ezp rest api v2; add support for PATCH method