Merge pull request #532 from rockmacaca/1.7.2

Refactor deprecated functions to prepare for a future update to 1.7.10 after 1.7.2
Rebalance GC energy.  Add support for 2 energy tiers.
Tweak positioning of Arc Lamp and Thruster items in first person view.
Energy - consistent handling of maximum energy input rate.
Fix Vec3.fakepool references reverted in error.
Fix Energy Storage unit detection threshold in UniversalNetwork.
Update th_TH.lang

It's wrong. Oops! -_-
Compatibility - GC machines energy display in MJ or EU command & config
Compatibility - added command /gcenergyunits
Fix some issues with beam receivers
Merge remote-tracking branch 'origin/master'
Scale up beam reflector/receiver in entity item renderer.
Merge pull request #534 from SteveMCCommander/patch-21

Update th_TH.lang