Update to version 0.7.6

Update sphinx to the latest version

Update version to 0.7.4

Update version to 0.7.3

Update release version to 0.7.2

Fix setup of primary keys is sql adapter

Describe the format of the ChatterBot corpus

Update release version to 0.6.3

Update version to 0.6.2

Update release version to 0.6.1