* Update tags.lua
To get speed unit
* Update way_handlers.lua
Adjust speed by speed unit
* Create test_speed_unit.lua
To test speed unit parser
* Take speed unit as input in speed parser
* In Belgium the maximum speed in rural areas is 70 in the region Flanders
* parse maxspeed using source:maxspeed and maxspeed:type tags
* add changelog
* make maxspeed:advisory more important than maxspeed
* add test for source:maxspeed
* set and store highway and access classification for the turn function
* expose highway turn classification and access turn classification and speed to the lua profile turn function
* expose whether connection road at turn is incoming or outgoing
* add lua tests for exposed information to turn function
* update docs about attributes in process_turn
* add turn_classification info to docs
* adding warning if uturn and intersection dont match
* handle u turns that do not turn into intersection[0]
* split OSM link generation in an accessible coordinate function
