Makes hidden entity loaders accessible. Rewritten add-loader with new loader snapping logic and graphics.

Bug Reports outside Forum or Github will be ignored!

Features:

• Graphics from Arch666Angel, updated by Kirazy.
• Rebalanced recipes to cost slightly less than fully upgraded inserters/stack inserters required for same chest>belt throughput.
• Loader Snapping works for all belt entities.
• Fully supports BobLogistics and Bobplates from 0.15.1 upwards.

Data functions for creating loaders 1.6.0+:

create a loader:

make_loader_entity(name, belt, tint, next_upgrade)
  String name
  Prototype.TransportBelt[] belt
  Types.Color[] tint
  String|nil next_upgrade

create an item with nice icon

make_loader_item(name, subgroup, order, tint)
  String name
  String subgroup
  String order
  Types.Color[] tint

Control API for custom loaders 1.3.0+:

To register loaders with Loader Redux use the remote call
remote.call("loader-redux", "add_loader", loader-entity.name)
in on_init and on_load

Credits:

kij336 - add-loader
Arch666Angel, Kirazy - graphics
Nexela, ReverseStateMonad - train worker rewrite
Articulating - original Loader Snapping