Merge pull request #2 from yingjieMiao/lda

gitignore
Merge pull request #3 from yingjieMiao/lda

tiny clean up
Merge pull request #4 from yingjieMiao/lda

add some utility functions
Merge pull request #5 from yingjieMiao/lda

save idf file. add a trivial test file
Merge pull request #6 from yingjieMiao/lda

small clean up
Merge pull request #7 from yingjieMiao/lda

in memory doc iterator option
Merge pull request #8 from yingjieMiao/lda

save sampled word topics. avoid NaN in sampler b/c of non-thread-safe
Merge pull request #9 from yingjieMiao/lda

reduce memory garbage in DocSamplingActor
Merge pull request #10 from yingjieMiao/lda

clean up. extract LDAConfig
Merge pull request #11 from yingjieMiao/lda

misc refactoring
Merge pull request #12 from yingjieMiao/lda

remove an unnecessary parameter
Merge pull request #13 from yingjieMiao/lda

thread safe sampling
Merge pull request #14 from yingjieMiao/lda

misc optimization and clean up
Merge pull request #15 from yingjieMiao/lda

minor performance improvement in sampler
Merge pull request #16 from yingjieMiao/lda

misc documentations and clean ups
Merge pull request #17 from yingjieMiao/lda

minor clean ups
Merge pull request #18 from yingjieMiao/lda

support burn in and skip steps
Merge pull request #19 from yingjieMiao/lda

more configurable
Merge pull request #20 from yingjieMiao/lda

do not store word counts in topic
Merge pull request #21 from yingjieMiao/lda

don't do this approximation