Redesign Body and BodyParts APIs, close #1238
Add HttpProtocol.baseHeaders(headers), close #1240
Have one handler per user, close #1231
Merge pull request #1241 from excilys/one-handler-per-user

Have one handler per user, close #1231
Fix build
Upgrade AHC timestamp
POM cleanup + fix license in .bat scripts
Merge pull request #1242 from pdalpra/pom-cleanup

POM cleanup + fix license in .bat scripts
Disable rfc6265 by default