Merge pull request #356 from lukase/master

Make minimal ./configure work on Windows/MinGW
Fix two new clang warnings.
Merge branch 'master' of github.com:OpenLightingProject/ola
Fix lint warnings.
- Use the user's local appdata folder as default location on Windows
Merge branch 'master' of https://github.com/OpenLightingProject/ola
Merge branch 'master' of https://github.com/lukase/ola