Better constant naming; unused strings removed.
Nothing calls Slot:getBackgroundIconTexture() anymore, it all goes through the new Icon texture code.
Adjustable Transformer tracks average EU throughput and input packet size
Transformer output logic reworked - will function properly with output rate < packet size
More displays for Adjustable Transformer
Cleanup, deduplication, bugproofing
Simpler, better transformer rate limiting
Clarified transformer GUI transfer rate label
Slightly less simple, but still better.

Fixed bug in recent rate limiting change. Only input rate was working.
Buffer was allowed to accumulate far beyond amount required to emit
configured packet(s). Both limits are properly considered now.
Texture options for transformer
Adjustable Transformer now swaps output side textures based on output packet size

Need to decide which of the texture options is best. 1 is better for
consistency with IC2, but is less visible; 2 can be seen around most
wiring but may look busier or confusing
Merge pull request #127 from pantheis/master

New test build