typo 'varable' to 'variable'
add Full Stack Python
add links for Tom's neural net intro
add jetpac links
add YADB link
add numpy intro PDF link
add questions
add recent blog post
clean up and move file
run-through, updates, extensions
add scaling question
more activity and description
tweak slides
prob use this data
add questions
remove pointless assignment - resolves #39
correct link - thanks @justmarkham!