v0.1.7, 2014-04-23 -- Protection around GPIO callback SPI fixes for bug introduced in previous version.
v0.1.6, 2014-04-23 -- Fixes to allow global variables to be used for devices with more than one channel.
v0.1.5, 2014-03-30 -- Modifications to make Device classes simpler.
v0.1.4, 2014-02-03 -- Code cleanup.
v0.1.3, 2014-02-03 -- Removal of debug print statements.
v0.1.3, 2014-02-02 -- Fixing script module references.
v0.1.2, 2014-02-02 -- Fixing dependencies.
v0.1.1, 2014-02-02 -- Fixing dependencies.
v0.1.0, 2014-02-02 -- Initial release.
