Fixes #2 by removing the *.gz files

If one really wanted it could be purged back from old history of the
repository back in time with all manner of git crazy voodoo

Perhaps something like

```
git filter-branch --force --index-filter 'git rm --cached --ignore-unmatch hg19.rmsk.chr.parsed.fa.gz hg19.rmsk.fasta.gz' --prune-empty --tag-name-filter cat -- --all
```

Of course doing crazy stuff in the repo can be tricky

There is also a supposedly friendly cleaner available/recommended 

http://rtyley.github.io/bfg-repo-cleaner/