Added automatic sorting of the shellcodes by size when searching

The script now tries to parse the size of the shellcode ( Generally indicated at the end of the title ) when searching and sorts the results by size, putting all the results that could not be sorted at the end.

Before:
![Before](http://i.imgur.com/d9FSH.png)


After:
![After](http://i.imgur.com/qFTl7.png)