commented out broken bits
Synced with .Rmd file
Testing md output
Added explaination to lazy evaluation example start.

Merge branch 'master' of https://github.com/scisus/UBCadv-r

Conflicts:
	03_Functions/Functions_Susannah.md
updated promises-lazy evaluation section
Merge pull request #21 from scisus/master

Correct pull request for functions stuff from Susannah