User a property for `data` in QSPlugin
Add a new and improved plugin updater
Only implement the QSPluginUpdater class(es) in one binary
Plugin Updater eye candy

Plus - pass the whole QSPlugin to the updater (in an NSDict) to simplify the setup process of the window
add a titlebar to the plugin updater
have more fine grained control over plugin update status
Proportionally scale images up or down in the plugin updater
Plugin updater comments and DRY
Merge branch 'master' into pluginUpdater

Conflicts:
	Quicksilver/Quicksilver.xcodeproj/project.pbxproj
tweak the display of the installed version number
Slight tweaks to improve display of the changes in the plugin updater
allow users to skip plugin updates all togetther
fix a crash
alpha values the wrong way around
Make QSPluginUpdaterWindowController public
hide the changes info for obsolete plugins
increase the size of the name textfield to ensure all text is always displayed
Install the new plugins over obsolete plugins
Merge pull request #1354 from pjrobertson/pluginUpdater

(10.7+) New Plugin updater. Fixes #1332