0.2.1
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* Pull request #12 fixes:
 - Fixed indent in the i2c-1 dts
 - Removed import dependencies in the SPI and PWM overlays
 - Re-enabled building of the dtbo on setup.py install

0.2.0
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* Added the ability to load DTB Overlays from within CHIP_IO
 - Support for PWM0, SPI2, and I2C-1 (which comes back as i2c-3 on the 4.4 CHIP
 - Support for a custom DTB Overlay
* Fixes to the pwm unit test, all but 2 now pass :)

0.1.1
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* Some refactoring of the edge detection code, made it function better
* Added Rising and Both edge detection tests to gptest.py
  - Small issue with both edge triggering double pumping on first callback hit

0.1.0
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* Fixed edge detection code, will trigger proper for callbacks now

0.0.9
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* Fixed SoftPWM segfault
* Added Alternate Names for the GPIOs

0.0.8
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* Updates to handle the 4.4 kernel CHIPs.  Numerous fixes to fix code issues.
* Added ability to get the XIO base into Python.
* Still need a proper overlay for Hardware PWM and SPI.

0.0.7
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* GPIO edge detection expanded to include AP-EINT1 and AP-EINT3 as those are the only other pins that support edge detection

0.0.6
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* Initial PWM
* GPIO edge detection and callback for XIO-P0 to XIO-P7 working

0.0.4
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* Initial Commit
* GPIO working - untested callback and edge detection
* Initial GPIO unit tests