Cleanup: Update copyright notices to 2013
ComputeEntropy: Allowed control over smoothing, sorting, add norms by log word/cell count
Undo previous undoing of Naive Bayes fix
experiment: Remove outdated SCALABUG comment
Fix implementation of word weighting
UnigramLangModel: Copy iter items to avoid concurrent-mod exception; remote items with 0 weight rather than setting count to 0, to avoid crash later
Document weight handling better, fix some bugs in weight and missing-word-weight handling
Add --ignore-weights-below
New postprocess.AnalyzeProperty
Rerank: Fix bugs in --rerank-features handling
Rerank: Allow multiple types of rerank features to be specified
Cell: Eliminate separate CombinedLangModel structure
default partial=true for kl-divergence, cosine-similarity; make kl cache optional
util.math: Add log2, logn
Rerank: Major work; implement binning, add non-word-specific features
Update comment about use of Doubles as WordCounts
Memoize: Rewrite memoization code; memoize ngrams to Ints, as with unigrams
Memoize: Finish cleanup of unigram/ngram memoization unification
Rerank: Change --rerank-classifier default to avg-perceptron
Memoize: Remove unused blank_memoized_string