add missing comma
consolidate two related sentences into a paragraph
add missing word and comma
add missing period
Use list to keep section readable
restore whitespace
Merge pull request #85 from Trott/copyedit-readme

Copyedit README
Partial fix for #87

 - the content has gone missing.
Fixes #80 - grammatical error in CRP

Thanks @theodysseylab - this should be live in a couple of days (still automating our deployment)
Fixes #84 - great spot. 

Thanks @zaccolley - cc @igrigorik