Also include extension .lsa

[ehoogeveen-medweb]

Hi, thanks for your work on this extension!

Could you also add file extension .lsa to the list of supported languages? This is the extension used internally by Domino for LotusScript Agents (if you look for *.lsa in the Domino Designer you will find only agents), whereas .lss is for Script Libraries. I don't think there's any difference in syntax.