Updated .gitignore
Fixes for Windows support

* allow custom installation directory using basedir
* replace windows_batch call with execute call due to return code glitches
* move default databases from basedir\data to given data_dir
* improved my.cnf template file
Make the test database removal more robust
Changed Windows MSI version. The old one was no longer available.
Added more Windows fixes.
Fixed indentation
Converted single quotes to double quotes. Windows does not like single quotes.