Merge pull request #2 from Michon-BS/master

modified Metric command
More tolerant scen file reading

For compatibility with TMX:
- Timestamp & command now separated using'>'
- Timestamp read using ':'
So it's no longer purely column number based
TRAIL acid color command added

Yoeri's addition to TRAIL command
Trail and GUI update

1) Trail command bug is solved.
2) BlueSky Tools/GUI contains a GUI which can create .scn files
Merge pull request #4 from ytorel/master

Trail and GUI update
Merge pull request #1 from ProfHoekstra/master

Up-to-date with ytorel & ProfHoekstra