'gem install rake-compiler' is still needed for cross build.
Change all remaining Oid <-> VALUE conversions to UINT.
Add missing spec for hash form parameters to #exec_params .
Fix gcc warnings in mingw build.
Bundle libpq.dll into gem, because PostgreSQL-9.3 does no longer support static linking.
Merge branch 'master' into column_type_mapping

Conflicts:
	ext/pg_connection.c
	spec/pg/connection_spec.rb