add sample for multi-indexes
model trees
big files with GridFs
week 3, homework 1
able to display list of posts & user information
tested display of blogs in home
ready to crete posts
able to create posts
ability to add comments to psots
added post not found
creating indexes mongoshell
added discovering indexes and multi-key indexes
multi-key indexes
creation of multi-key indexes of sub-keys
dropDups
sparse documents
.explain()
hiting queries
move js files to src
hinting in Mongo driver