[ci] run morse test w/xvfb

- revert to blender 2.64 w/python3.2.3
  to sync with system's python3 version.
- NOTE: increase color depth to 16,
  the default 8 bits is not enough for OpenGL.

Thanks to Séverin Lemaignan for his help!
[light] fix 2.69 share light energy between scenes
[testing] Fix more fallout from 'timestamp' addition
[pymorse] Updated setup.py before releasing to pypi
[doc] Converted README to markdown and added Travis badge
[style] Removed all redundant paratheses

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[style] Removed all unnecessary backslashs in line continuation

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[style] Fixed inconsistent identation

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[style] Create dict/list as literal when possible

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[style] Use augmented assignment when possible

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[style] Simplified boolean tests

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Testing for None must use 'is'

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Default parameter must not be mutable

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Local variable possibly referenced before assignment

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Do not use the 'callable' Python keyword as arg name

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[style] Remove trailing semi-colons

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