Correct the sentence in one of the slides.

It should be "known not to be" rather than "known not the be".
Correct a sentence in one of the slides.

It seems "to the population" was repeated twice, fix it.
Merge pull request #2 from abhinav-upadhyay/lecture2-fix

Correct a sentence in one of the slides.
Merge pull request #1 from abhinav-upadhyay/lecture1-fix

Correct the sentence in one of the slides.
Editted lecture 10
Merge branch 'master' of github.com:bcaffo/Caffo-Coursera
Recompiled the pdfs for 1,2 and 10