added headings to ipynb, reword part3
removed core.quit(), changed to two bitmaps
Tiny header updates
Create README.md
Merge remote-tracking branch 'origin/master'

* origin/master:
  Create README.md
  tweak
  removed core.quit(), changed to two bitmaps
  added headings to ipynb, reword part3

Conflicts:
	Part1_Intro_to_Python.ipynb
	Part2_PsychoPy.ipynb
	Part3_Scientific_Python.ipynb