Add multiple-cursors

Load-path stuff had to be changed since it didn't jive
well with projects that end in '.el'.
Change how load-path is set up.

Removed site-lisp/subdirs.el
Add require and keybindings for multiple-cursors.el.
Change how the bells and whistles are turned off.
Add custom section.
Ignore eshell dir.
Add js2-mode
Add note.
Fix spacing.