ace-window.el: Bump version

Update README.md

Update for the customization options for the midway action.

Fixes #46

Update outlines

ace-window.el (aw-select): Rename from `aw--doit'

ace-window.el: bump version

ace-window.el (aw-swap-window): improve

Can now swap when there are two frames with one window each.

ace-window.el (aw-offset): use inhibit-field-text-motion t

Fixes #12.

ace-window.el: tag 0.5.0

Fixes #14

ace-window.el (aw-visual-area<): improve.

Now the frame to which window belongs is the first key by which the
sorting is done. This means that the windows that belong to the same
frame will be numbered sequentially.

ace-window.el: change version to 0.3.0