Changes to Upsert Query Builder

• Have upsert expert query builder distinguish action on conflict.

Parameter Style formatting

Incorporate parameter style formatting options in dml upsert and insert statements.

Bug Fix

• Fixed retrieving the primary keys for a table when the primary key constraint appears in multiple tablespaces.

Extended Copy From Support

• Standardized copy from insert, upsert, delete from CSV API's
• Small breaking change in formatting copy from now taking a Python encoding flag vs. postgres.

Fix Extension Creation

• fixes bug in creating an extension when the extension name contains "-".

UUID Extensions

• Generic helpers for adding extensions
• Configuration for psycopg2 UUID adapter
• Installation of server side extension libraries for server side UUID support.

Minor enhancement

• Add initial readme
• Move fixtures to package for easier reuse in other package test suites.

Initial Release

• compilers for ddl statements
• dml functions that take iterable sequences
• Postgres to Python data type mappings