Updated release version number to match libgetdns

Merge branch 'develop'

Fixed some clang compilation warnings

Removed ldns dependency in build instructions

merge cleanup

Added provisional support for TLS transport

cleanup for merge

__version__ is actually a getdns module attribute, not a Context() at…

…tribute

Fixed MacOS compilation problems

added context_set_upstream_recursive_servers(context, [address_list])…

…, created generic getdns_dict address dict converter