added shortcut to edit hosts file
added a to-do list
added link to check out for research
removed mergetool settings from .gitconfig

For now I’m going with opendiff, the OS X default.
working on some instructions
added the "edit" command

This will launch the current default editor, which allows me to easily
swap editors without changing the command I use.
note that the instructions are a work in progress
added an EditorConfig file
Merge pull request #16 from natedillon/develop

v0.7.0