Package docs maintenance, Default GA params change

* Removed duplicate ‘Example’ documentation; now maintaining only one copy in
  examples/README.rst
* Added link to jeffknupp’s sandman repo in HISTORY
* Modified make release to also upload project documentation
* Added Installation, and Example info to README.rst
* Removed easy_install installation step from docs/installation.rst (pip is
  sufficient)
* Added a simple example of usage to docs/usage.rst
* Added docstrings to all methods
* Reduced the default GA population and generation size (to allow applications
  that use the different parameters to run quickly)
* Modified tests to account for the new default population, generation size
Update to version v0.2.2
Merge branch 'release/v0.2.2' into develop

* Package documentation maintenance.
* Changed GA population size and generations to speed up default GA runs.
Added previous 0.2.2 changes to HISTORY
Corrected date of most recent log in HISTORY