refactor JSON parser stack
refactor JSON parser stack

mongodb/libbson,mongodb/libbson,mapr/libbson,mapr/libbson,rcsanchez97/libbson,mongodb/libbson,ajdavis/libbson,rcsanchez97/libbson,ajdavis/libbson,ajdavis/libbson,rcsanchez97/libbson,mapr/libbson