r51 release

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Changes:

Now translated into the following languages:
- Dutch
- German
- Italian
- Russian
- Spanish
- French
- Chinese
- Polish
- Portuguese (partial)
- Turkish (partial)
We use Transifex for translation, so if your language is not yet listed here, help is welcome: https://www.transifex.com/electrical-age/
Simulation improvements
- “Game changing” improvements for transformer simulation model
- New mechanical shaft system to transfer mechanical energy by rotation
Icons redesign
- Most icons redesigned and 3D renderings replaced by symbols
- The different voltages are represented by different background colors
- Better charge overlays for portable items/batteries
Item updates:
- Completely new model for the lamp supply
- New model for the circuit breaker
- New functions for the signal processor: pow, acos, asin, rescale
- Added silk touch functionality to auto miner
- Improved defense turret rendering / behavior
- Improved placement for almost all items
New items:
- Sconce lamp
- LED bulbs
- Rheostat
- Steam turbine (Buildcraft compatible, mechanical output)
- Very high voltage generator (mechanical input)
- Fuel generators (50V and 200V model) (Mod providing fuel liquid required, ex. Buildcraft)
- Logic gates:
  - NOT chip
  - AND chip
  - OR chip
  - NAND chip
  - NOR chip
  - XOR chip
  - XNOR chip
  - D Flip-Flip chip
  - JK Flip-Flop chip
  - Schmitt-Trigger chip
  - Oscillator chip
  - PAL (Programmable Array Logic) chip
Bug fixes and improvements:

#429, #400, #396, #390, #389, #386, #382, #381, #380, #379, #375, #374, #371, #368, #367, #365, #351, #344, #339, #335, #333, #332, #323, #309, #289, #279, #267
Added configuration options:
- Autominer range
- Fuel generator power factor
- Fuel generator tank capacity
- LED bulb lifetime
- Wireless signal range
- Cable serial resistance
Removed dependency to modbus4j
- Replaced modbus4j by build-in Modbus RTU slave implementation (minimal)

… and most certainly we forgot to mention something here…