add a method for pasting as plain text from the clipboard
allow pasting as plain text when double clicking as well
use new documentation format\
make the Shelf plugin a required plugin
Merge branch 'master' of github.com:quicksilver/elements.clipboard-qsplugin
Version bump
compile documentation into Info.plist
use human numbering (1-9) in the clipboard view
Merge pull request #9 from quicksilver/pjr

add a method for pasting as plain text from the clipboard. Fixes quicksilver/quicksilver#1450