Added types exporting and corrected result_tuple type
Added r16 support.
Merge pull request #9 from Licenser/r16

Use crypto:hash/2 instead of deprecated crypto:md5/1.
Merge pull request #8 from klastochkin/master

Added types exporting and corrected result_tuple type
Adapt script to R17
Add R17 UTF-8 encoding header
Avoid crash of connection when passed invalid parameters (e.g. atoms)
Allow non-null Weights in numerics
Add support for geometric types
Merge pull request #12 from yjugl/master

Add support for geometric types
Replace usage of deprecated gb_tree/0
Export pgsql_connection/0 type
Synchronize to version 21