Facade items render the block part correctly, pipes still messed up
Pipe render state defaults to dirty to trigger a sync when placing a pipe
Merge remote-tracking branch 'remotes/upstream/mc1.5'
- avoid npe in PipeItemRenderer.java
- remove obsolete function from blocks
Tweaked Hopper fill speed
Merge remote-tracking branch 'remotes/upstream/mc1.5' into 1.5