[mkgmap-dev] Commit r4143: merge from angles branch

Version mkgmap-r4143 was committed by gerd on Sat, 31 Mar 2018 merge from angles branch Improvements to WrongAngleFixer. - Remove spikes from roads where rounding to Garmin units creates them. - Try harder to avoid overlapping road segments where in OSM they build an angle but the rounding places them on top of each other. http://www.mkgmap.org.uk/websvn/revision.php?repname=mkgmap&rev=4143