Log time it took to process request in access logs
Do not rotate logs on tomcat, let logrototate do that.
Add RemoteIpValve.

Useful when running behind SLB or reverse proxy, 
as it sets request.remoteAddress to be one provided
by proxy in X-Forwarded-For header.
Add doublequotes for rotatable
Remove extra . from filename
Merge pull request #17 from TomiTakussaari/master

Some improvements to logging