Fix CMake files for install
Add discriminating_bscore::full_bscore

That flag is for computing the bscores inheriting
discriminating_bscore at a finer grain.

Specifically, if enabled, the variable componant of the
discriminating_bscore is divided across all rows of the ctable. Each
one accounting for its contribution to the overall score.

This has been added to handle diversity pressure with
discriminating_bscore. By default it is disabled but once it has been
measured as yielding no overhead (which I believe) it will be enabled.

Also, only prerec_bscore currently takes advantage of it.
Forgot opencog/learning/moses/scoring/CMakeLists.txt