Merge pull request #956 from lambday/master

Added log_det method in CStatistics for Dense matrices
A splat for KRR test
move normalizer assignment to init() to avoid code duplication
normalize LA kernel to have norm 1 on the diagonal
add missing include to fix compile error
normalize diagonal to one for LIK by default
include normalizer after kernel header file to fix compile error
Fixed unit test for log-det Sparse Matrices
Fixed unit test for log-det Sparse Matrices