Merge pull request #9 from jegonzal/master

Removing deprecated gibbs sampler binary
fixed ec2 als_demo demo script
fixed a bug in dox for collaborative filtering
started moving factor toolkit out of deprecated
added the factor graph/belief propagation toolkit
Removed old research-experimental-legacy-stuff from apps and ext-apis.
cuckoo_map_pow2::reserve() now verifies if the map needs
to grow before actually resizing.
Merge pull request #10 from dbickson/master

fixed ec2 als_demo demo script
removed uncessary assertion from svd.cpp
removed comment
removed an unneeded trace
added factor graph unit tests
avoid the serialization penalties if the string will just be discarded
added the option to turn off MPI
added a distribution statement
Merge branch 'master' of https://github.com/scott-vsi/graphlab
added a new log level (LOG_EVERYTHING) to the logger.
Merge pull request #12 from dbickson/master

Removed unneeded assertion from SVD code
Merge pull request #11 from ylow/master

Removed old research-experimental-legacy-stuff from apps and ext-apis.
Moving Aroma's latest DD code + description to Github