Added tc_hs.rb that tests that HS class is handled correctly with send_plain_message.
Merge pull request #46 from keithrbennett/fix-hs-class

Added test for correct handling of HS class with send_plain_message.
Added test_plain_respects_bufsize() that tests that requested bufsize is handled correctly with send_plain_message.
Merge pull request #47 from keithrbennett/bufsize-issue

Add test to illustrate correct handling of bufsize with send_plain_message.