Adds support for Spigot 1.13+. Requires new BKCommonLib and Traincarts.

Changes:

• Fix sneak-clicking (shift-clicking) not working when holding the map in the main hand
• Fix station sign directional redstone input not working correctly with TC Coaster rails
  
• Changing the rail block of multiple selected nodes, now preserves relative offsets of the rail blocks
• Two nodes can now be connected together by selecting both and right-clicking the air in create mode
• Fix a bug where deleting did not deselect nodes, causing strange behavior during undo/redo
• Add set rail command (/tcc rail x/y/z or /tcc rail up/down/north)
• Check for use permission of the map, so creative players can not hack in the map and use it without permission