Allow to disable norms on an existing field.

Close #4813
PagedBytesReference with a boatload of tests. Passes all new and
existing tests. Non-allocating hashCode/Equals, zero-copy writeTo() and
ChannelBuffer support.

Fix for #5427
[Docs] updated the search template and query template docs
[DOC] Clarify settings and documentation about norms.
Internally manipulate the terms execution hint as an enum instead of a String.

Close #5530
Temp. disable use of new PagedBytesReference since it breaks HTTP replies with 0-sized Content-Length
Update Documentation Feature Flags [1.1.0]
Added versions 1.1.1, 1.0.3 & 0.90.14
Fix compilation error from last commit.
Fix PMD warning: don't reassign method parameters.