Merge pull request #1 from dlwh/master

log -> log1p
things begin to compile
slow, unverified implementation of low-rank
implement (unoptimized) low-rank with monte carlo gradient
Merge branch 'master' of github.com:jacobandreas/lllm
gitignore hprof
update to new igor format
bugfix
fix constant featurizer
precompute factored feature representation
sync with igor refactor