Reduce the finder proxy cache time to 0.5s
Reduce Latest Download cache time

And tidy up file
Set the default proxy cache time to 2s
move the kQSDefaultProxyCacheTime definition to the header

…so other proxy objects can use it
generalize getting info for other proxies
respect the cache time of the passthrough proxy

If there isn’t one, use the default.
adjustments to failDate

* It only gets used in a class method, so it doesn’t need to be an
iVar. It’s declared locally.
* Made it static
* Sync the timeout for failure with the default proxy cache time.
They’re not the same thing, but they should both be updated as hardware
gets faster.
make Current Selection more efficient

* only get information for the current application once
* alter the order when getting types: types from plist, fallback to
string, types from provider → types from provider, types from plist,
fallback to string
* eliminate the poorly named passthroughProxyInfo class method
keep copied QSObjects in memory

The old method would try to pull the object from a specific memory
address, but that address could point to garbage by then.

Also, the result from `objectWithIdentifier:` was never being returned.
Now it will be.

fixes #1716
let QSLibrarian hang onto copied QSObjects
store the identifier as the identifier instead of the string value
use string value for the Type Text action

Allows it to work with contact phone numbers, and many other types.
replace hard-coded pasteboard types with QS types
use display name for objects in command names
make Finder Selection proxy refer to symlinks

…instead of returning the path to the source file(s)

fixes #1729
only log the name of the object being examined

and not a list of every known action
don't try to resolve `*` to a UTI

fixes #1777
Before writing to the pastboard, store NSFilenamesPboardType info

The current method QS uses for writing to the pasteboard (pre 10.6) can't deal well with UTIs
Tidyups and comments on UTI/pasteboard stuff
Merge pull request #1774 from quicksilver/i1716

keep copied QSObjects in memory