Merge pull request #6 from sonofmun/master

Copy editing of chapter 3
upload new chapter and new data
various updates
new style
upload pydf sources and data
update start command to new ipython 2.x
move to separate chapter
update chapters
upload some converted pdfs
upload interface image
some extra pdfs
more pdfs to static folder
whoops my mistake
multiple fixes
add copy or move functionality
update
round up the day
update chapter 8 and scripts
new styling
new screenshot pydf app