codebug_tether 0.5.0

Control CodeBug over Serial USB.

CodeBug Tether
==============
Control CodeBug in tethered mode over Serial USB.

Documentation: http://codebug-tether.readthedocs.org/

Features:

- LED control
- Inputs/Outputs (legs, buttons, extension pins)
- Input/Output configuration (direction and pullups)
- Extension pin control (I/O, SPI, I2C)
Change Log
==========

v0.5.0
------
- Updated packet layer, better support for bulk commands and AND/OR masks.
- Added extension pin control.
- Added I2C/SPI support.
- Added Colour Tail (WS2812) support.

v0.4.3
------
- Updated docs.

v0.4.2
------
- Fixed `set_output()` but where setting value of one leg would reset
the other legs.

v0.4.1
------
- Added timeout to serial initialisation and updated charmap `led_state`
to `pixel_state` to match previous change.
- Added `set_leg_io` method.

v0.4.0
------
- Changed led -> pixel

v0.3.0
------
- Removed confusing channel list.
- Ready for release on GitHub.

v0.2.0
------
- Added and_mask into set packets.

v0.1.2
------
- Added some more examples.
- Updated the readme.

v0.1.1
------
- Fixed CodeBug.get_input().

v0.1.0
------
- Inital dev release.