Added usage of precalculated common prefix length
Conjugation length expirement
New expirement for the constant
Count cache distances
Now Hashed::get_longest_prefix accepts the parameter to limit the lenght
Added small optimization to check first letters
Binsearch in reductions length cache. Enlarge cache size
Merge pull request #25 from stevens-crag/SLPSet/ReductionLengthBinSearch

Slp set/reduction length binary search