First commit - server with cuckoo hash prototype

Classic (2-ary) cuckoo hash table with char* keys.
  (Insert, find, delete implemented.)
Simple bitset (not used right now).
Several hash functions downloaded from web.
Universal system of hash functions (according to J. Katajainen & M. Lykke
  of University of Copenhagen).
Several basic data structures for DNS data - not finished yet.