Add support for the taiwanese client, fixes L-Leite#5

Use Tiancity's keys if "sedata.dll" is in the index file. Fixes L-Lei…

…te#2

Fix broken decryption on Tiancity's files

Update readme

Fix uninitialized variables

This fixes the options functionality (bsp gets fixed now, etc)

Fix being unable to only decompress BSPs

Make sure that the extraction and loading threads exit gracefully
Release PDBs are now built with 'DebugFull'