Add more REQ_STR for non-Utf8Value
Enable Unicode connection strings
unicode: start properly handling Unicode based on defined UNICODE flag
unicode: finish up proper handling of Unicode in all classes
fix: use SQL_DESC_TYPE to get the column type
fix: re-introduce connectionString objects
test: update test runner to test multiple drivers
fix: specify SQL_WVARCHAR or SQL_VARCHAR for params depending on UNICODE
test: updated tests and new default for MSSQL Native Client connectionString
bench: move insert benchmark to disabled
bench: update benchmarks to run with run-bench

Eventually we will have a table which displays results for each driver
Merge branch 'unicode-madness' into v0.5
0.5.18