Add calculator-copy-to-clipboard.
Attempt to add compatibility with Emacs Mac Port.

Just in case.
brokensymlinks and chrome-purge-keywords have moved to utils.
Disable undo-in-region.
More drag-stuff bindings.
Disable show-paren-mode in calculator.
Remove conflicting 'make-frame binding.
Fix bug in (un-)quote-region.
Tone down the paren-match colors.