Tests for spark
Add tests for SparkCoreAdaptor's postToSpark
go fmt spark tests
Example for direct GPIO control on Beaglebone

* Contains some annotated on potential gotchas
* Penance for hybridgroup/gobot#98
Merge pull request #100 from trevrosen/dev

Example of connecting adaptor manually for minimal code to accomplish GPIO control
Fix: Sphero partial collision data

The previous behavior would throw out the data if incomplete rather than waiting for additional data.

On some async packets there would be a DLEN of 17 but no body (some of the body was retrieved, but not all 17 bytes, so nil was returned).

With this change it waits for enough data.
Merge pull request #95 from hybridgroup/148-spark-tests

Tests for spark
Merge pull request #101 from nathany/sphero-readNextChunk

Fix: Sphero partial collision data
Adding leap sphero example
Merge pull request #103 from hybridgroup/leap-sphero

Adding leap sphero example
Adding leap + servos example (robotic hand)
sphero: calculate checksum of response packets

a little more robust.
Merge pull request #104 from nathany/sphero_checksum

sphero: calculate checksum of response packets