Release v0.1.1

Fix crash on empty index file.
Fix case-sensitivity for standard hashes, add more hash support.

First fully usable release

Adds proper exception handling, cancellation, and optional mod support, along with support for side-only mods.

Testing release 9

Check for the existence of cachedFiles before doing anything with it.

Testing release 8

Correctly handle file invalidation

Testing release 7

Handle renamed files correctly
Log invalidated files

Testing release 6

Ensure that files are deleted when they are removed from the pack metadata.
Redownload files when they are deleted from disk.

Testing release 5

v0.0.5-pre

Implement preserve and alias in index

Testing release 4

v0.0.4-pre

Gson isn't broken, I'm broken

Testing release 3

There might be a lot of these.

Testing release 2

This time, it actually does something. Still not ready for final release yet!