Create base line using coordinates

[IanMayo]

In addition to the moving marker, we draw a line that shows the route.

This means the marker will move along the route.

Could you:

• [x] insert a PowerPoint shape that represents a freehand line
• [x] simplify the OOXML for this line down to a few coordinates
• [x] create a script to parse the attached GPX file
• [x] create a script to use our set of coordinates for this line . Note: the attached file has two tracks, so we'll have to make a copy of the line.
• [x] change the color of the line to match the color in the GPX file

Note: I'm pretty sure the line will use a different coordinate space to the animation path.

Note: I've considered the projection issue, in #9

Note: the coordinate systems are discussed in this article: https://startbigthinksmall.wordpress.com/2010/01/04/points-inches-and-emus-measuring-units-in-office-open-xml/

[IanMayo]

Tracks.txt

[IanMayo]

longer set of coordinates: long_tracks2.txt

(file updated, y-axis inverted in previous version)