fixed Dictionary acc_update bug
initial commit for RecurrentDictionary
SentenceSet:sentences()
removed momentum from languagemodel.lua
Optimizer{update_interval} argument
initial commit for SentenceSampler
initial commit for recurrentlanguagemodel.lua script
SentenceSampler ready for debudding
SentenceSampler unit test
SentenceSampler works (unit tested)
Recurrent fixes + unit tests
RecurrentVisitorChain and cie.
recurrentlanguagemodel.lua script works
Merge pull request #95 from nicholas-leonard/recurrent

SRNN-LM