Notice that this change required a bit of hacking.
setAveragingAction now takes a std::unique_ptr as an argument.

I think ownership is clearer now since it is explicitly declared.

valgrind reported usage of this as an uninitialized value, so I set
it. However, looking at the code below it looks harmless.

Changed histogram so that it is calculated by default using Giovanni's formula for reweighted histogram

[makedocs]

Notice that almost all files were updated with the astyle commit
2813d759

Year in header is here updated to 2017

This is a huge commit, applying indentation to the whole
code. Notice that this commit is made on master branch
after having merged with -s ours from branch v2.3

See #215

This is a huge commit, applying indentation to the whole
code.

See #215