CDS 2.7.13

Number of updates to help display and process larger jobs such as LIDAR data.

Includes the following updates

1. variable ascii input. If reading in data that doesn't contain point numbers then it no longer checks for existing points numbers to avoid multiple point numbers. The numbers are allocated hence they wont clash
2. speeded up re-indexing of chainage/offset index
3. speeded up onscreen display. For example 2.3 million points will now render in under 10 seconds
4. if database contains more than 200000 points then CDS automatically displays job as a point cloud. Any text for large jobs just leads to a massive blob on screen anyway