Release v0.1.0-alpha

Initial release, contains fixes and enhancements implemented on top of the original project.

• Proper CMake support
• Invalid UTF-8 sequences are silently converted to the replacement char (default: U+FFFD)
• Throw exceptions in (unlikely case) that WinAPI calls fail (there is no meaningful recovery in such cases)
• Support for boost::filesystem::path in streams
• Critical bugfix of putenv leading to potential read of invalid memory