Rewrote the zip methods to no longer require zip4j. The updater is already threaded and too many threads were spawning and complicating the processes, and threadless mode wasn't working.

Added natives extracting to the ModpackInstaller.

Updated Library to contain fallbacks to the Technic mirror and Maven central for download sources on libraries.

Seperated out Mojang gson parser and regular gson parser into different objects in Utils, in case problems arise with using Mojangs parsing method on our own APIs in the future.

Signed-off-by: Dalton Pelc <daltonjpelc@gmail.com>