Bug Fixes. See below for more details.

- Fixes a bug in continuous digital input sampling, causing it to
  terminate unexpectedly.
- Fixes a bug in the self calibration on board start up, causing some samples to read as 0.
- Fixes a bug in ADD_DIGITAL_OUTPUT command parsing.
- Fixes a bug in SET_DIGITAL_OUTPUT command parsing.
- Improved performance of digital input multisampling.
- Bug fixes and improvements for analog input calibration.
- Fixes a bug in analog input multisampling.
- Fixes a parsing bug in all READ_* commands when specifying a set or
  range.

Signed-off-by: Jared Woolston <jwoolston@tenkiv.com>
Preparation for v1.0.1.0 release.

Signed-off-by: Jared Woolston <jwoolston@tenkiv.com>