fix bugs
Update README
Add DR8 astrometry notebook
Merge pull request #8 from weaverba137/master

Update README with actual meeting dates
Sampling from an exponential probability distribution
Merge branch 'master' of https://github.com/adrn/NYCastroML

Conflicts:
	Chapter1/Section_1.6.1-5.ipynb
adding Or Graur's python notebook for Section 4.5-4.7
Uploaded Section 4.1-4.4 review

Containing mainly my opinions and points for discussion.
Cleaned up
typo fixed
Merge https://github.com/adrn/NYCastroML