WIP: on migrating to official spark module
WIP on tests for spark adaptor and spark adaptor refactor.
Updated spark adaptor and tests are on WIP. figuring out how to test the API
Fix typo in analogwrite call.
Fix issue on digital read not triggering callback with value 0.
Updated analogRead and removed logging.
WIP on new specs for spark.js
Updated getDevice to normal stub.
Merge branch 'dev' into upd-to-official-spark-lib

Conflicts:
	lib/spark.js
Change stub for getDevice until spark updates their module.
Merge pull request #21 from hybridgroup/upd-to-official-spark-lib

Upd to official spark lib