Hyperbole 7.1.0 TEST RELEASE - activate any labeled button; link-to-file with line and col numbers; documented link-to-bookmark

BUTTON TYPES

- In-buffer Labels: Fixed a number of in-buffer text handling issues with
  the creation of explicit buttons, maximizing reuse of existing text in
  labels.

- link-to-file Action Type: Extended to allow file path to include either
  :line-num:column-num or just :line-num at the end (translated to character
  location within the button).

DOCUMENTATION

- Bookmark Mode: Added Hyperbole Manual section, "Smart Key - Bookmark Mode"
  that allows linking to Emacs Bookmarks.  See "(hyperbole)Smart Key -
  Bookmark Mode".

MENUS

- Activate Any Labeled Buffer Button: Hyperbole's top-level menu 'Act'
  command either activates any button at point or prompts for the choice of
  any labeled explicit or implicit button within the buffer to activate.
  The pulldown menu item, Activate-Button-in-Buffer, behaves the same.

- Org-mode in Q&A Appendix: Rewrote this section to account for improved
  integration.