Merge pull request #7 from dbickson/master

SVD accuracy fix
Update README.md

Fixed apt-get install string.
Removing deprecated gibbs sampler binary
Merge pull request #9 from jegonzal/master

Removing deprecated gibbs sampler binary
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
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
Moving Prakriti's latest stitching code to Github
Merge pull request #14 from scott-vsi/factor_graph

I looked over the pull request and the code looks great!  I will re-enable building against MPI by default after accepting the request but will add a configure option to disable MPI.