New feature: Provide a public accessor to the getWindowSize() functionality.
The accessor returns only the number of columns, i.e. window width.
Merge pull request #10 from andreas-kupries/feature-export-get-console-width

New feature: Export console width through accessor API
Bug fix. Discount the characters of ANSI color control sequences.

Without discounting them they cause the input area to start too far right
of the end of the prompt.
New feature: Maintain a cut/paste buffer.

The existing bindings for Ctrl+k, Ctrl+u, and Ctrl+w are
modified to fill the cut buffer with the characters they deleted.
The new binding for Ctrl+y inserts the contents of the
cut buffer at the current position.
Merge branch 'feature-hidden-input'