Fix module name generation

Atoms for which atom.toString() would yield
a quoted string (i.e. if it contains non-
ascii, numeric or _) would cause module names
to be emitted with the 's encoded into the name.

src/main/java/erjang/EModuleManager.java

@@ -117,7 +117,7 @@ private EFun getFunErrorHandler() {
 		}
 
 		private EFun makeErrorHandler() {
-			return EFun.get_fun_with_handler(fun.module.toString(), fun.function.toString(), fun.arity,
+			return EFun.get_fun_with_handler(fun.module.getName(), fun.function.getName(), fun.arity,
 					new EFunHandler() {
 
 					@Override
@@ -362,7 +362,7 @@ public EFun resolve(EPID pid, EBinary md5, int index, final int old_uniq, final
 
 			if (maker == null || !md5.equals(module_md5)) {
 				LocalFunID fid = new LocalFunID(module, ERT.am_undefined, arity, old_index, index, old_uniq, md5);
-				return EFun.get_fun_with_handler(this.module.toString(), "badfun", 0, new EFunHandler() {					
+				return EFun.get_fun_with_handler(this.module.getName(), "badfun", 0, new EFunHandler() {					
 					@Override
 					public EObject invoke(EProc proc, EObject[] args) throws Pausable {
 						throw new ErlangError(am_badfun, args);
@@ -386,7 +386,7 @@ public EFun resolve(final EPID pid, final int old_uniq, final int old_index, fin
 
 			if (maker==null) {				
 				LocalFunID fid = new LocalFunID(module, ERT.am_undef, 0, old_index, 0, old_uniq, empty_md5);
-				return EFun.get_fun_with_handler(module.toString(), "badfun", 0, new EFunHandler() {					
+				return EFun.get_fun_with_handler(module.getName(), "badfun", 0, new EFunHandler() {					
 					@Override
 					public EObject invoke(EProc proc, EObject[] args) throws Pausable {
 						throw new ErlangError(am_badfun, args);

src/main/java/erjang/ERT.java

@@ -626,7 +626,7 @@ public static EFun resolve_fun(EObject mod, EObject fun, int arity) {
 
 				final EFun pfun = EModuleManager.resolve(new FunID(pmod, f, arity+1));
 
-				return EFun.get_fun_with_handler(pmod.toString(), f.toString(), arity, new EFunHandler() {
+				return EFun.get_fun_with_handler(pmod.getName(), f.getName(), arity, new EFunHandler() {
 					@Override
 					public EObject invoke(EProc proc, EObject[] args) throws Pausable {
 						EObject[] real_args = new EObject[args.length+1];