Milliseconds where not printed with 3 digits and added parse method for military styled

10 ms where rendered with ...00:10 and 100 ms with 00:100. Now the string stays much more stable. I would also interpret the : like a . and tailing zeros can be ommited. From this interpretation both samples at the beginning would be the same number.

I also added a parse method that parse strings in military style back to a number in ms

Both are in different commits so it should be easy to only take one if desired.