project clean-up

* fix Configuration path
* Remove unused framework refs and files
* improve build settings
fix warnings
prevent an exception during scanning
don't base tag and item types on bundle ID

It confused me just now.
updates for Yojimbo 4
add a type definition for Yojimbo tags
require Yojimbo 4
add support for the Current Selection proxy object
explain how to fix duplicate items
hard-code the icon for the catalog preset
don't resolve the selection unless Yojimbo is running
Merge pull request #2 from quicksilver/yojimbo4

updates for Yojimbo 4