adding cygwin branch to instructions
adding images of prompt and aliases
adding git status images that show dirty flag
Adding example images to readme.
Update README.md

adding some basic tutorials for the git desktop app & branching
fix git clone link to have new organization name (my bad)
Fix prompt length issue where we lose a character when scrolling through history
adding notes from cygwin branch to readme
Adding link to cygwin branch
Merge branch 'master' into cygwin

Conflicts:
	README.md