Updating "Other Courses" to include Security Course

Update README.md

Adding reference to new OSS curriculum

Revisions in Logistic Regression R lesson

Remaning taks on Logistic Regression Lesson 4

Update Line 38 of 2-Regression/4-Logistic/README.md

Updating the first Youtube video in Line 38. The video should point to Episode 14 rather than Episode 16!

Changed the logistic regression and the multinomial v/s ordinal regression infographics

Fixed hyperlinks and knitted the Rmd files to html for beginning half of the repo