Added a global $test_all flag
Added a test for goban.clear + adapt timings to new perf

(so that most tests run in around 95% of expected time)
new method move_number
comments only
Simplification (we use the fact that group is nil for empty)
Better algo for "enlarge" (still ongoing work)
cosmetic: renamed coefficients
Spacer: removed non orthogonal coeff "main"
Removed "stone-taken" (now constant =1)

...and divided all other coeffs by 3
comments only
Split heuristics to their own file
Breeder plays tournaments (again)

...but disabled when we run all unit tests (no point)
empty points around stone now called empties

(not lives - lives making sense only for groups)
minor optim: call directly escaping_atari_is_caught

+ renamed "support" in lives_added
logging
logging
Hunter handles snapback + refactor & fixes

(added tests)
Merge pull request #1 from kubicle/develop

Develop