Tests for server unit.
TAP protocol output.

Added liburcu dependency to Makefile.
Added some simple test for seeing how it works.
Replaced printf with debug_cuckoo in cuckoo_hash_table.c.

Created subdirectories of src/ for better organisation of the
  files.
Modified Makefile accordingly.

Proper change of the Makefile + some fixes of it.

An actual (working) development version should be always in this
  branch.
For subtasks, new branches will be created. For now all the old
  files are here, although this is actually a subtask. Later,
  we will remove all the old code from this branch and move it to
  some other branch.
The master branch should be used for working or stable versions.

Added .gitignore file.
Created basic directory structure for the project and changed
  Makefile accordingly.
Added QtCreator project files (CuteDNS.*).

Added general table mutex, locking when inserting, rehashing and
  destroying.
Added rwlocks for 2 items. Will be used in rehashing.

Removed read_domain_names() and test_lookup() functions.
Added dnss_wire_format(), dnss_dname_to_wire() and dnss_parse_query().
Many functions in universal-system.h and bitset.h not inline any more
  (should check it later and find a way to make them inline).

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.