creating branch for matrix operations
Merged /trunk:r2688-2744, i. e. bring up-to-date.
Merged /trunk:r2745-2752
Move matrix test away.
Matrix class and test.
Declare matrix multiplication routine.
materialize_from_row_major.
Merged /trunk:r2753-2758
Merged /trunk:r2759-2765.
work at matrix container and multplication
Make matrix code compile.
Merged /trunk:r2766-2773
work at matrix multplication and container details
matrix container and multplication, simple test
Construct matrices internally.
Renaming.
Increment indices for internal matrix multiply.
Cache-efficient and parallelized internal matrix multiplication.
Taking timings using STXXL stats.
some tests for matrix multplication
Test for doubles.