Update README.md
sample code from class today
lesson 05
elevator design exercise sample solution
lesson 07
updated lesson 08 source
lesson 09 sample exercises
sample BST soln for lesson 8
lesson 09 ngrams
lesson 08 heap sample soln
Update INSTALL.md
hash map example
Merge branch 'master' of https://github.com/generalassembly-studio/CSF_Homework

# By ruddct
# Via ruddct
* 'master' of https://github.com/generalassembly-studio/CSF_Homework:
  Update INSTALL.md
Update INSTALL.md
Merge branch 'master' of https://github.com/generalassembly-studio/CSF_Homework
Some changes to folders.