Merge pull request tds-fdw#152 from juliogonzalez/2.0.0-alpha.2

Version 2.0.0-alpha.2

Issue tds-fdw#101: Fixed some more issues with 9.6.

Updated META.json. Changed release_status to unstable. Changed it to …

…point to new GitHub repository.

Changed version numbers to 1.0.7.

Changed version numbers to 1.0.6.

Changed version numbers of 1.0.5.

Added some documentation for the new variables.

Fixed issue with CREATE EXTENSION.

Changed version numbers to 1.0.2.

Fixed META.json.