Bumping version to v0.7

Forgot that 'map' doesn't include insert mode. Bah.

Navigation over 'display lines', not 'logical lines'.

A tiny bit of documentation.

Adding `scrolloff` to push the cursor down into the text

Finishing the initial feature set

*   Clearing the status bar

*   Adding toggle functionality (executing `<Plug>Vimroomize` a second
    time will get you back to "normal" vim mode with the color scheme
    reset, and all secondary windows closed.

Hiding the `NonText` syntax group (`~` at EOF, for example)