Updating the Json Engine to be less dependency heavy.#8

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ryanbartley wants to merge 4 commits intocyrillef:masterfrom ryanbartley:master

+7,784-1,618

Commits on Jul 31, 2016

Commits on Aug 4, 2016

Updating linux cmake path but ran into a problem with dl being undefined in fbxsdk
bartleyryan
committed

Commits on Aug 5, 2016

Fixed linux build of glTF cmake, still need to work out problems with Windows
bartleyryan
committed