Make the Builder support contentLength explicitly.
Merge pull request #999 from thabach/master

Introduce explicit contentLength property on the AtmosphereRequest.Builder
Add some debug info, fix pathc matching
JSR358: Make it work on a locally patched Tomcat 8
More work towards jsr356 support
Couple of todo
Final Fix for #992
Fix for #1000
Fix for #1001: If the session is dead, do nothing