Moves nedtrie in benchmark to keep always the same order.
Adds benchmark for Concurrency Kit.
Sets explicitely the gnuplot styles.
Restores the google libchash, even if still disabled.
Merge branch 'ck'

Conflicts:
	benchmark.cc
	benchmark/gr_def_random_change.gnu
	benchmark/gr_def_random_hit.gnu
	benchmark/gr_forward_change.gnu
	benchmark/gr_forward_hit.gnu
	benchmark/gr_forward_insert.gnu
	benchmark/gr_forward_miss.gnu
	benchmark/gr_forward_remove.gnu
	benchmark/gr_forward_size.gnu
	benchmark/gr_other_cgoogledensehash_problem.gnu
	benchmark/gr_other_judy_problem.gnu
	benchmark/gr_random_change.gnu
	benchmark/gr_random_hit.gnu
	benchmark/gr_random_insert.gnu
	benchmark/gr_random_miss.gnu
	benchmark/gr_random_remove.gnu
	benchmark/gr_random_size.gnu
Adds tests for ck and libchash.
Some comment improvments.
Test with more elements in x64.
Fixes build in the Windows platform.
Some more documentation improvments.
Some minor changes at the benchmark defines.
Updates .gitignore for a clean status.
Removes the allow spikes, as we really have to keep the max.
Uses a new color scheme for graphs.
Merge branch 'master' into open

Conflicts:
	benchmark.cc
	benchmark/gr_def_random_change.gnu
	benchmark/gr_def_random_hit.gnu
	benchmark/gr_forward_change.gnu
	benchmark/gr_forward_hit.gnu
	benchmark/gr_forward_insert.gnu
	benchmark/gr_forward_miss.gnu
	benchmark/gr_forward_remove.gnu
	benchmark/gr_forward_size.gnu
	benchmark/gr_other_cgoogledensehash_problem.gnu
	benchmark/gr_other_judy_problem.gnu
	benchmark/gr_random_change.gnu
	benchmark/gr_random_hit.gnu
	benchmark/gr_random_insert.gnu
	benchmark/gr_random_miss.gnu
	benchmark/gr_random_remove.gnu
	benchmark/gr_random_size.gnu
Put hashopen after other hash in the graphs.
Some code clearifications.
Shift color attributes due hashopen insertion.