Launch4j 3.13 released

• FR #127 Added multiple bundled JRE path search (%JAVA_HOME%).
• Allow equal sign in environment variable assignments.
• Fix sign4j warnings for implicit definition of lseek, read, write, close, and access (foss1024).
• Add launch4j console mode launch script for *nix (Luke S).
• Tickets #172, #186, #198, #200, #206 Launch4j GUI supports also Java 1.9 and up.