add support for inet, cidr and inet/cidr arrays
Merge branch 'net_types_conversion' of git://github.com/tnt-dev/epgsql into tnt-dev-net_types_conversion

Conflicts:
	src/epgsql_binary.erl
	src/epgsql_types.erl
Merge branch 'tnt-dev-net_types_conversion' into devel