-keeptitle and -keepnotfound

Hi I use ES-scrapper on my RPi cabinet project, I love the EmulationStation and the RetroPie projects. I just wanted to have the possibility to keep rom title as it is on the rom file, to keep informations given by original titles.

I added the -keeptitle argument that keep the filename as the rom title. Except for Arcade system where the mamdb name is kept (it contains all needed informations)

I also added the -keepnotfound argument, it writes games in gamelist.xml even if game info cannot be found.