Update README to clarify functionality and installation details

Release version 1.3

Revert "Abbreviate default value of ws-butler-trim-predicate"

Add a copy of the GPL

Release version 1.2

Exempt org-agenda-mode from ws-butler-global-mode by default

ws-butler--global-mode-turn-on: Check for the `special' mode-class

Release version 1.1

Use more standard indentation in call to `list'

Clarify docstring of ws-butler-global-exempt-modes

ws-butler-with-save: Use bound-and-true-p

Exempt compilation-mode from ws-butler-global-mode by default

Add a comment about define-globalized-minor-mode's :predicate param

Release 1.0 to nongnu-elpa.git

Refactor ws-butler-global-mode to prevent byte-compiler warning