Switch to ToolbarWrapper

Also fixed references to old methods for crew management
(CrewRoster.AddCrewMember is private now?) - switched to reflection
method to compile
first (or tenth) pass on adding button to applauncher

- Somehow onGUIApplicationLauncherReady is firing multiple times
(workaround: buttons are static class members)
switch blizzy toolbar on/off using config

need to restart game to reliably take effect. still seeing multiple
instances of ShipManifestBehaviour in the FLIGHT scene
update config xml
Merge pull request #5 from ragzilla/master

Make Blizzy Toolbar Optional