bumped version to 1.6.0
added testcase
bugfix close should ignore connection resets
fixed tests
bumped version to 1.6.1
Merge branch 'stable/1.6.x' of https://github.com/denisenkom/pytds
Merge branch 'master' of https://github.com/denisenkom/pytds
Merge branch 'master' of https://github.com/denisenkom/pytds
improved bad_instance_name test