added annotated notes
updated a_notes
renamed class10 folder
updated readme
updated syllabus topics
updated syllabus topics
updated syllabus topics
materials for today
added kmeans lab
MERGE

Merge branch 'master' of https://github.com/gads14-nyc/fall_2014_lessons
added kmeans country lab;
Merge pull request #5 from gads14-nyc/master

ds 13