Compile Sunflow with GCJ

Needed that a Java JAR to be compiled using GCJ on Windows to not ask users to install Java runtime for rendering component. Steps: 1. Download Sunflow from here: [login to view URL] 2. Download GCJ from Cygwin or from MinGW (MinGw I consider it better because it has less dlls to be used, but is not that important) 3. Compile [login to view URL] to be an .exe file. Test with example files that are on the sunflow site that makes at least one simple render without crash. 4. Provide at the end ALL binaries needed to be installed. This can be provided in a zip file.