Marshall V8::Date with System::DateTime

Both ways
fix #81: managed memory leak
Merge branch 'master' of github.com:thermous/edge into thermous-master
tests for DateTime marshaling
Fix marshalling of empty byte[]/Buffer
Fix #35 & #68: dynamic support
add test for marshaling of empty buffers
update binaries
update to v0.7.13
update to v0.7.14-pre
Update README.md

Very small typo
Merge pull request #82 from jonmills/patch-1

Update README.md
update samples to use dynamics