Accept string between ''

src/parser/TokenSource.cpp

@@ -139,7 +139,7 @@ void TokenSource::build_composite_token() {
             break;
         }
     }
-    while(_buffer[_cursor] != '"');
+    while((_buffer[_cursor] != '"') && (_buffer[_cursor] != '\''));
     _cursor ++;
     
     ensure_capacity();
@@ -212,7 +212,8 @@ std::string *TokenSource::read_token() {
     else if (_buffer[_cursor] == '%') {
         build_definition_starter();
     }
-    else if (_buffer[_cursor] != '"') {
+    else if ((_buffer[_cursor] != '"') &&
+	     (_buffer[_cursor] != '\'')){
         build_simple_token();
     }
     else {