Extra Map Symbols  

- adds additional map symbols following base game style
- adds symbols variants to base game symbols (requires Extra Map Symbols UI)
- replaces angled arrows with own version, aligned to roads
- replaces "KnifeFork" with own version
- replaces "Wrench" with own version

Map symbols interface tweaks.
- allows to change number of columns used for symbols
- allows to change size of symbols/text
- allows to use crayons for adding symbols to maps
- allows to add symbols variants
- slightly resizes and repositions ui elements

External mods support:
- custom events for smoother integration with external mods

Note that while both mods are independent (for now), and do not require each other, some of features are not available if only one mod is enabled. In future, mods will be merged into single one

Works in multiplayer.