Added flashing for abnormal health bar values. Added missing icons. Added brain function bar.
Fixed keybindings being effective in GUIs. Fixed NPE in OpTableGUI.
A bit more symmetry.
Made steve's legs blue and feet grey.
Revert "Made steve's legs blue and feet grey."

This reverts commit 5b1215eee72121cf02bf051b89cdacb24dd9ecf7.
Sprinting -> increased metabolism rate.
Added a block.
Apparently changed stuff.
Pipes can be created, but not destroyed yet.
And now pipes can be deleted, by right-clicking.
Moved pipe drawing to Guts so it can run server-side.
PipeCrossTiles can be removed.
Pipe drawing actually affects stuff.