IEventCore to support child events
New emoticons + Merge branch 'master' of https://github.com/SocietyPro/Cambrian-src
Merge branch 'sopro-ot' all Mongoose work to maintain consistency with master branch.  Does not affect Cambrian.pro because COMPILE_WITH_MONGOOSE  is defined only in sopro.pro
updated Restful tests.  Enabled only with COMPILE_WITH MONGOOSE