Add sharpen options
Map MissingMethodException
Fix java.lang.Double.toString(double) mapping
fix java.lang.Character.valueOf mapping
fix java.lang.ThreadLocal mapping
Merge branch 'master' into develop

Conflicts:
	src/Rhino/Commonjs/Module/Require.cs
	src/Rhino/Jdk13/VMBridge_jdk13.cs
	src/Rhino/NativeError.cs