beltSorter_0.2.0

Split off mod from hardCrafting.
For factorio 0.13.0

Features:

• define 4 items as filter for each direction
• select items to filter from a nice gui (recent history, search function, tooltips for items)
• use circuit signals or logistics condition to control it (works almost the same as the lamp entity)
• works also with splitter / underground-belts as input or output
• reduces speed when not enough energy is available (shuts down entirely when energy below 10%)