Merge pull request #3 from noamross/master

Added frog
added contributing file
forcing when what is catfact to use cat for by
small edits to say function and contributing file
added noam to readme
fixed force to cat animal when calling catfact
Add "hypnotoad" option.

Image from here:
http://chris.com/ascii/index.php?art=television/futurama
Replace eval(parse(text=...)) with get()

See fortune(106)
Merge pull request #4 from richfitz/master

New art, plus minor tweak
changed to get from eval-parse after richs suggestion
minor edit to explain matcharg for by argument, and hypnotoad eg added
edits to docs, filled out package doc file, edited readme
bumped version and added rich as author
removed lubridate dependency, upated to new roxygen2 ver, sckott/cowsay@0831cc68f3583d9ac37b9874072230f2552b51a5
added contributing file to rignore
edited egs, edited readme
updated readme details
added iheartquotes api, updated readme, bumped to v0.2.4
added travis and button to readme
added you to the contribs list

what what