Version bump

TF 2.0 note in README

Merge pull request minimaxir#116 from minimaxir/0.6

0.6

Version bump

Remove assertion due to false positives

Cap gen length if prefix to prevent OOB (minimaxir#38)

Explicitly set prefix to None if empty

Merge pull request minimaxir#56 from minimaxir/0.5

0.5

Load only necessary data + threads

Fix CSV input