Fix bug in SinglePointCrossover, will just swap the whole Genotypes.

--HG--
extra : source : f0b7f86251a2b2a8a144f0354ac568248b81c0c8
Prepare for bug-fix version.
Prepare for bug-fix version.
Prepare for version v1.1.1.
Added tag v1.1.1 for changeset efd2163dca54
Add download section to README file.
Add download section to README file.
Add download section to README file.