PyGreSQL version 5.2.2

PyGreSQL version 5.2.1

PyGreSQL version 5.2

PyGreSQL version 5.1.2

PyGreSQL version 5.1.1

Fix manifest.in and shift release date of 5.1

Fix manifest.in and shift release date of 5.0.7

Correction to tag name.

Update release date in tag.

Put actual release date for 5.0.5.