Updated the test_multi_point_crossover.py to test for different chrom…

…osome sizes.

Update documentation with new version 1.9.0

Update README.md

Merge pull request #2 from vrettasm/multimodal_feature

Multi-modal feature supported.

Rerun all examples.

This tag flags the most updated version of PyGenAlgo.

The most important update is the corrected usage of the
hash functions in both Gene and Chromosome classes.

Removed unnecessary check for field that doesn't exist.

Removed unnecessary check for field that doesn't exist.

Update readthedocs configuration file.

Fix typo.