feat(key-bindings): adds several new keybindings

Red bar cursor indicator in god mode, moves magit to separate setup
file. Adds commented start to editing powerline faces. Change control
binding for other-window.  Removes unused control bindings.  Adds a
collapse-lines control binding (C-j).  Adds fullscreen magit status
buffer. Adds kill-process kill-shell to shell mode (C-d). Turns off
linum globally, adds linum when jumping to line.
fix(setup-magit.el): fixes colorization of diff
feat(helpers.el): add several helper functions

Adds eval-and-replace (at point) (C-c e).  Replaces the sexp with its
value, in any buffer.  Adds rename-file-and-buffer (C-c r).  Adds
delete-file-and-buffer (C-c D).  Removes redundant subword from
js2-mode (already globally enabled).  Removes reduntant tab
whitespacing, adds whitespace highlight lines past 100 char.  Brightens
diff colors in magit.