Detect browser support for structured clones, and stringify postMessage payloads (in Client and PostMessageParticipant) only if structured clones not supported. Also includes bugfix in rcp.js wherein object was being passed to parse. refs #10
Add check for FF bug cloning File objects in feature-detect for structured clones
Cache result of structured clone support function

Cache result of function call when detecting structured clone support

Cache result of function call when detecting structured clone support
Add unit test for structured clone support with postMessage. refs #10
Content of unit test was left out of previous commit. refs #10
Merge pull request #34 from ozone-development/feature-postMessage

Feature post message