new module: repeatscout

[sreerampeela]

The purpose of the RepeatScout software is to identify repeat family sequences from genomes where hand-curated repeat databases (a la RepBase update) are not available. In fact, the output of this program can be used as input to RepeatMasker as a way of automatically masking newly-sequenced genomes. The original git repo is https://github.com/mmcco/RepeatScout