This commit puts in place the ability for multiple views (splits).
This commit also removes the editor bindings so that all bindings can be
rebound by the user.
I also added some more comments
This fixes#109
This is better design because the cursor and eventhandler are things the
buffer should know about directly but the view shouldn't. This should
make it easier to add persistent undo or location saving between
sessions (see #107).
It seems rope.Report is not acting how I expected it to. I need to look
into this in more detail but for now I am adding the Text variable back
to the Buffer.
Fixes#98
This commit splits "Boss mode" into to different actions. Executing
a command with Ctrl-b will now open an interactive terminal. If you
would simply like to execute a background job in the shell, press
Ctrl-e and then type `run shell-command`.
