Homebrew path fix on MacOS

* get_closest: start search around the requested frame

In this way the first valid thumbnail that is found is also the cloest,
allowing for an early return statement.

* move is_remote inside thumbnailer state

* new job order strategy

No longer needs a second table, does exactly thumbnail_count insertions

* Switch to command_native

mp.utils.subprocess is deprecated

* Clean up the patched osc

* Trailing commas

diff -u osc.lua patched_osc.lua

It also creates a new patch in case the offsets or the context changed

…#45)

The actual filename part is often similar for different URLs,
so use the full path. Ensure it is always hashed to prevent
bad characters from entering file names.

Closes #44