fixup! Show a tool tip when searching wraps around
Modify gen_build to accept keys for copying into nested directories
Initial Quick Look generator setup
Move some bundles code from index.h to query.h
Rename “index.{h,cc}” to the more appropriate “item.{h,cc}”
Use @rpath so the QL generator can load frameworks from the app bundle

@executable_path is the originally-executed program, whereas @loader_path is the program that caused the load to occur (i.e. the Quick Look generator). @rpath can be changed at link time — the QL generator specifies a value that points to the enclosing app bundle’s Frameworks directory.
Move fs_cache to plist framework
Move load_bundles to bundles framework
Add TARGET_ALIAS setting

If TARGET_NAME is specified, it will specify the bundle/executable name of the target. If TARGET_ALIAS is also specified, it will be preferred over TARGET_NAME for @-references from other targets.
Functional preview generator