Allow proxies to cache our responses.
Merge pull request #82 from ddumontatibm/fixes

Allow proxies to cache our responses.
Request URL length optimizations
Merge pull request #83 from chuckdumont/master

Request URL length optimizations
Merge remote-tracking branch 'jaggr/master'

Conflicts:
	jaggr-service/src/main/java/com/ibm/jaggr/service/impl/transport/AbstractHttpTransport.java
Resolve merge conflict