Add 'output' directory to ignored hg files.

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extra : source : 1c7671951e89ada7fa9d9aa94aba0b6dfc7c3050
Fixing bug in ProbabilitySelector. When minimizing a fitness-function, the probabilites are not correctly inverted.

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branch : r2.0.1
Increase version number and update change.log file.

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branch : r2.0.1
Update README file.

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branch : r2.0.1
Run performance tests: Intel(R) Core(TM) i5-3427U CPU @ 1.80GHz

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branch : r2.0.1
Fixing 'invert' method in ProbabilitySelector class. Writing unit tests.

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branch : r2.0.1
Run performance tests: Intel(R) Core(TM) i5-3427U CPU @ 1.80GHz

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branch : r2.0.1
Fix typo in javadoc.

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branch : r2.0.1
Improve probability array sorting.

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branch : r2.0.1
Improve probability array sorting.

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branch : r2.0.1
Run performance tests: Intel(R) Core(TM) i5-3427U CPU @ 1.80GHz

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branch : r2.0.1
Merge 'r2.0.1' branch.
Added tag v2.0.1 for changeset b264818995ec