Use CTRL-W as escape sequence.

This may sound strange to you but this sequence is generated by F1 in my
autokey setup. So this is quite handy to use as a screen escape as well.
Improved hint to outlook macro settings.
Rewrote major parts of this script.

The plan is to have most of the filter functionality in separate scripts to
keep this simple. Thus, -w was dropped. Use filter-chr as a replacement.
Verbosity is now optional, use -v to switch it on.
Extended the list of word chars.