Fixes #48. Thanks @aleksbreian1103!
Fixes #18. Thanks for the idea @pfaffman!
Removing unnecessary dependencies. Fixes #50

See #50 for more details on the details of what happened.
Fixes #53
Minor update to 3.9 - #55
Safety checkin for Chapter 7 ipynb
Updates to appendices
Update Chapter 3 - Mining LinkedIn.ipynb

Changed len(range(xyz) to enumerate.
Changed occurrences of range to the more memory efficient xrange.
Changed condition from: 
if title.find(seperator) >= 0: 
to 
if title.find(seperator) == 0:
Safety checkin of Chapter 7

Note quite done with the examples or testing, but most everything is in
place.
Update Chapter 3 - Mining LinkedIn.ipynb

Updating #55, may want to remove some of the debug code or add a comment that Bing doesn't map the text "Hawaiian Islands" to be part of the my beloved home state of Hawaii.
Full draft of Chapter 7 ipynb

Also includes some helpful updates to the App C notebook regarding tips
for monitoring/memory issues from within IPython Notebook
Remove unnecessary line of code from last commit
Fixing long code lines in Chapter 7 ipynb
Updating version of PyGithub in pip requirements
Reordering some examples. Fixing a broken tweet id
Tweaks to the Chapter 2 notebook
Updating comment
Removing a somewhat superflous/confusing example
Update dependencies to use python-linkedin on PyPI
Updating source code comment