Fixed docs build WARNING: Title underline too short
mutate and selection function tests implemented
Corrected project name in README

Changed the project name in the README file to reflect the actual project name,
not the description.

Also added a little description and a note about the project being currently in
development.
Corrected project name in documentation

Changed the project name to 'pyeasyga' in all conf files and in static
documentation files that are part of the final documenation build.