swap=false by default in CLI

[nvoelzow]

On PointCloudConverter command line, adding swap=false creates the same output as omitting the parameter - only adding swap=true creates a diffferent output

[unitycoder]

swap is enabled by default, so what should happen is:

• swap not given: swap = true
• swap set to false: swap = false
• swap set to true: swap = true

*this is probably already fixed, can report to https://github.com/unitycoder/PointCloudConverter if still happening.