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 dry-run mode: detect but not post issue mode refs #30

This is similar to `make -n`.
Fix misspell refs #31
add Json.parseFile
Json: encode/decode any JSON values.
Merge pull request #30 from mzp/id/30

dry-run mode
Merge pull request #31 from mzp/id/31

Fix function name: isDetect -> isDetected
Jansson: malloc json_error_t each time
check out of memory.
Merge pull request #33 from mzp/wip/json

update werkcer box version