Added (again)
removed reference to multi filters
WriteLockFreeRead: Added feature that tells whether reading party has
actually read the data.
Removed min and max (already in std) and added minimum positive value
Stricter type for non floating point values
Supressed ugly prints in unit test when it does not fail.
Added template wrapper around qsort
Added Crossovers class, which is repsonsible for managing a set of
crossovers.