Fixed some bugs

1. Add comment mark (#) support for .srv file.
2. Fixed a bug which empty lines in .srv file cause error.
3. Fixed a bug which a const Single (float) type cause error. (add affix "f" after the value)
4. As 3, also add affixes for uint, long and ulong. ("ui", "l" and "ul" after the value)
5. Fixed a bug which cause can't get the correct name of const type.