Should fix some issues(like grass)
Fixed pipes in inventory losing transparency in various situations
Merge branch 'BuildCraft-5.1.x' into NextGen

Conflicts:
	common/buildcraft/core/utils/BlockUtil.java
Merge branch 'NextGen' of github.com:BuildCraft/BuildCraft into NextGen
Merge branch 'facade' of https://github.com/dmillerw/BuildCraft into dmillerw-facade
Merge branch 'pipe' of https://github.com/dmillerw/BuildCraft into dmillerw-pipe
made progress with builder save state, for #1575
completed first version of builder state save, for #1575
fixed localisation of highlight handler
Fix Filtered Buffer registering twice.

Should fix crash in forge 1057.
Start of the new block renderer
prepare release 6.0.6
fixed previous check-in
Crappy temp fix for #1576

I think it's something with time.
Update PipeTransportFluids.java
Addition of creative engine
Engine rendering changes, as requested by @CyanideX
Make getTrunkTexture not abstract
Merge branch 'texture' of https://github.com/dmillerw/BuildCraft into dmillerw-texture
standardized headers