Fix quotes

Signed-off-by: Rick Waldron <waldron.rick@gmail.com>
Analog reads on multiple pins

Signed-off-by: Rick Waldron <waldron.rick@gmail.com>
Removed duplicate env description, fixed syntax

Also took out old note referencing PWM pins since they are all
supported now and the note was confusing without historical context.
Merge pull request #37 from Resseguie/readme-env

Removed duplicate env description, fixed syntax
Forward sample interval to board handler
Add modesMap for improved error messages
Change analog input mode to correct firmata, handles conversion in voodoospark
Remove response body from error output
Ensure pin value is saved locally
Support REPORTING mode
Merge branch 'master' of github.com:rwaldron/spark-io

* 'master' of github.com:rwaldron/spark-io:
  Removed duplicate env description, fixed syntax
v0.6.0
Use calculated value
Add reference to which pins support PWM

Fixes #43