Changing the etags-select.el like cscope.el

- No new windows.
- Some key rebinding.
Jump to started window when press the `q` key.
Temporary settings.
Add `etags-select-show` function.
Add `etags-select-re-jump` function and Clean up.
Fix some problem occurred when using Emacs 24.3.
Remove some code for XEmacs.
Clean up.
Some highlight settings changed.