Fixed a major issue affecting the integrity of methylation calls when a user used multiple fasta files rather than a multi-fasta file. Bison_index no longer accepts lists, but only a directory. Fasta files in a directory are now alphasort()ed prior to processing, since previously the order in which they appear with readdir() could change. Further details in the README files. The version was bumped to 0.3.0 due to possible compatability issues.