Usage example: Use process.env for ID and token

Consistent with how examples in both spark-io and voodoospark are
written
Merge pull request #16 from Resseguie/process-env-vars

Usage example: Use process.env for ID and token
initial commit of j5 examples
moved j5 examples up a level
continuous servo example
fixed spark relative path after move
simple servo pseudo command prompt test
Ex w/ keypress to change servo direction
switch to OUTPUT mode

Use OUTPUT and analogWrite until SERVO and servoWrite supported in
voodoospark
Merge branch 'j5-examples' of https://github.com/Resseguie/spark-io into j5-examples