This commit contains the implementation details on
LLM refinements for supporting the new Identity dictionaries,
that remove the need for many of the matrix multiplications.

Furthermore it also contains the implementation details and optimizations
for selective Matrix Multiplications of matrices in the left side
containing only a single 1 in each row. The implementation there
simply decompress the rows associated with the 1, making the overall
compressed operation very efficient.

The overall implementation further improves the code-coverage of the
project by 0.24%