Clarify alternate screen changes for xterm in .screenrc.
Add our curl & wget rc files.
Add our readline rc file.
Tweak .vimrc to fix non-zero exit status on OS X.

See: http://tooky.co.uk/2010/04/08/there-was-a-problem-with-the-editor-vi-git-on-mac-os-x.html
Add a default .gitignore to remove OS X / Windows rubbish.
Add our initial .gitattributes files.