Version 6.53

[David]

Hi all!

This update includes:
- A new library for the vintage N gauge Endo track system

Updates for:
- O Lenz, flex track 45014 added
- H0 Peco Streamline Code 83: Concrete flex SL8302
- H0 Peco Streamline Code 100: Turnouts SL-U76/SL-U77
- H0 Fast Tracks: Mirrored threeway turnouts W6M and W9M
- N Bachmann E-Z track, correction of length 44899-3
- N Fast Tracks: Mirrored threeway turnout W6M

The list of materials now shows the total number of connections (between track ends)

Bugs fixed:
- Angled flipped images on a surface now displayed correctly
- Problem solved with smooth slopes for dual gauge track
- Problem solved loading very old track plans
- Problem solved drawing selection triangle after rotating zero length flex track

Enjoy!