Added troubleshooting installing some pacakges.
add link from my name to my blog
add additional git links
add link to Practical Machine Learning
Move troubleshooting from getclean.md to other.md
Merge pull request #6 from allanino/master

Added link in other.md for troubleshooting installing some packages.
Merge pull request #8 from justmarkham/updates

Updates to About, Practical Machine Learning, and Data Scientist's Toolbox
Update README.md
Merge remote-tracking branch 'upstream/master'
Move contribution to /other/##Troubleshooting per seankross' request