removed plugin source code

there is a github repo for plugins now
added bitcoin-central plugin
removed deprecated files
removed deprecated mtgox "plugin"
availableBundles now uses an array instead of a nsdictionary for use with an nsarraycontroller to populate the popupbutton
fixed typo
removed old app
the popup-button now gets populated by a nsarraycontroller
inserted nsarraycontroller outlet
changed visible at launch to NO to prevent the preferences window to show up on start
updated plugin bundle