Log Message:
Update ruby-tiny_tds to 0.7.0.

* 0.7.0 *

* Refactor build of FreeTDS & Iconv recipes. Add OpenSSL. Merged #207.

* Ensure zero terminated strings, where C-str pointers are expected. Use \ 
StringValueCStr() Fixes #208.

* Revert 999fa571 so timeouts do not kill the client. Fixes #179.

* Remove `sspi_w_kerberos.diff` patch. Not needed anymore.

* Tested again on Azure. Added notes to README on recommended settings.

* Replace `rb_thread_blocking_region` (removed in Ruby 2.2.0) \ 
w/`rb_thread_call_without_gvl`. Fixes #182.

* Remove 30 char password warning. Fixes #172.

* Remove Ruby 1.8.6 support. We always use Time vs edge case DateTime.