updated arrow tutorial for new traversals
fix .rst warning
minor updates to arrow tutorial
gaps is actually called gap
Merge pull request #50 from diagrams/arrow-tutorial

updated arrow tutorial for new traversals
Change `gap` to `gaps`
start outlining talk for LGM 2014
some LGM talk files to ignore
start an official .mailmap file to be used for all diagrams repos
bit of work on LGM talk --- graphing contributions over time
Update Sunflower.lhs

Looks better with a black backgroud.
clarify re: bugfix releases directly from master branch [ci skip]
graphing contributions over time for LGM talk
some boring files
doc/latex.rst: note graphicx is required, and beamer tip for making all frames fragile
LGM talk: regenerate logs in a good format
work on diagram for showing project history
.ptb is boring
work a bit on LGM talk
work on LGM talk [ci skip]