1.6.4: Fix refueling crash

Crash when erroneously trying to extract waste from a fully-fueled fuel
rod
Merge remote-tracking branch 'origin/dev'
(0.2.0A) Updating mod info files
Fixing README.md
Fixing mcmod.info
Unsaved changes
Issue #30: Fixing NPE on SMP server startup

Oops, Icons shouldn't be client-only.
(0.2.1A) Updating mod info files
(0.2.1A) updating changelog
Merging MASTER > DEV