Revision of PeerJ shortening

1. I really liked the Biology part of the old PeerJ section so I've tried to rework the new section to contain this while still maintaining the shortened length. It is the same number of lines but a couple of words longer. If it needs to be shortened more let me know and I'll try to drop a few more words using my Twitter-fu.

2. Recommend changing the PeerJ-Free status in Table 2 to 1/yr.