Documentation install location looks wrong

[skelet]

I compiled and installed Field3D and it installed the documentation in /usr/local/docs/html. Maybe I'm mistaking, but it doesn't look right - what if all projects did the same?

This install location comes from CMakeLists.txt line 152. I believe it was last altered by
hobbes1069@67d1490

A more appropriate install location would be PREFIX/share/doc/Field3D or something like that, in my opinion.
http://www.pathname.com/fhs/pub/fhs-2.3.html#USRSHAREARCHITECTUREINDEPENDENTDATA