update wercker box version to build jansson
(wip) Jansson http://www.digip.org/jansson/ binding.
split Jansson.jsonError into encodingError and decodingError.
Jansson: fix bug that currentErrorSource calls a wrong function.
add tests for Jansson.loads.
fix bug that Jansson.dumps calls a wrong function
add tests for Jansson.dumps.
add tests for Jansson.array_* functions.
add Base.flip.
add Json structure.
Makefile: introduce C_MODULES like MODULES and TEST_MODULES.
add Json.parseFile
Json: encode/decode any JSON values.
Jansson: malloc json_error_t each time
check out of memory.
Merge pull request #33 from mzp/wip/json

update werkcer box version
Merge remote-tracking branch 'origin/jansson' into id/34 refs #34

Conflicts:
	Makefile
	src/Base.smi
	src/Base.sml