Adds first pass at arithemetic scalar encoder.
Merge branch 'master' into arithmetic-encoder
Merge branch 'master' into arithmetic-encoder
Merge branch 'master' into arithmetic-encoder
Merge remote-tracking branch 'upstream/master' into arithmetic-encoder
Code review suggestion.
Merge branch 'master' into arithmetic-encoder
Merge pull request #155 from scottpurdy/arithmetic-encoder

Adds first pass at arithemetic scalar encoder.