Update to Steam 1.0.4

A new version of the game has been updated on Steam that changes the way mods are uploaded to Workshop. Adding a mod to workshop now requires the original compiled source data to be available to allow uploading. This allows only mod authors to upload their content.

Mods must be rebuilt with Mod Kit 141123 before this will work. Non-Steam versions should still function properly regardless if mods are built with the newest mod kit or the previous one.

Changes for 1.0.4 Build 141123