• misc: fix building wheels for unavailable Python versions
• test: skip getaddrinfo6 test on Travis
• doc: add FreeBSD building instructions
• build: fix MinGW build
• ci, misc: add support for CPython 3.7
• ci: run on latest PyPy versions on TravisCI
• examples: extra examples
• ci: fix AppVeyor build
• test: fix TXT test
• core: fix repr for PTR results