Fixed kernel for LuaJ, closes #324.
Don't trigger GC in LuaJ to avoid lags.
Slightly raised worker thread priority from minimal to somwhere inbetween normal and minimal, to reduce the likelyhood of the worker threads starving during server starts.
Merge branch 'master' of github.com:MightyPirates/OpenComputers into MC1.7

Conflicts:
	src/main/scala/li/cil/oc/server/component/machine/LuaJLuaArchitecture.scala