Serbia Motoputevi (srbm) and Serbia redo (tier 5 system to come)

[si404]

The new Serbia Motoputevi system is ready for review

https://travelmapping.net/hb/index.php?sys=srbm

This system was created this year, along with a small overhaul to other roads: https://www.paragraf.rs/propisi/uredba-kategorizaciji-drzavnih-puteva.html

In addition, as part of creating this system/starting work on the tier 5 system, I've overhauled the previously-existing A, B, and E routes. I've kept these reworks separate so they can be checked/reviewed before going live at some point soon (when the srbm system is reviewed? when I've created the srbr system?) as there was a lot of reworking and I'm bound to have missed something. Please have a look and comment.

https://travelmapping.net/hb/index.php?sys=srba2
https://travelmapping.net/hb/index.php?sys=srbe
https://travelmapping.net/hb/index.php?sys=srbb2

previous systems in mapview
new systems in mapview
changelog (that will become updates when launched