1.4.0

• Add license explicitly (BSD 3-clause) (#26)
• Rework elevation on Windows to not use separate batch file (#27)
• Improve support for non-ascii characters (#27)
• Migrate to Windows KnownFolder instead of CSIDL for win > XP (#27)
• support istalling as SYSTEM user on Windows (for SCCM usage) (#29)
• Add Appveyor for build testing (#30)
• Drop CSIDL support in favor of uniform KnownFolder usage (#31)