GUI: s/savegame/saved game/

Makes it consistant throughout the GUI
CLI: change "savegames" into "saved games", same as in GUI
MADS: Fix some memory leaks
ACCESS: Fix display of advert view on Exit
MADS: Hook in text credits view, beginnings of correct script processing
MADS: Implement sound player group #9
MADS: Actually hook in the new sound player group
MADS: Fixes to correctly display the credits screen
CGE2: Add detection for Sfinx v1.0 Freeware Polish
Merge pull request #492 from BenCastricum/misc

GUI: replace "savegame" by "saved game".
README: savegame -> saved game
README: savestate -> saved game
MADS: Converting text view to use existing drawing frameweork
I18N: Update credits for Dutch translation
I18N: Update scummvm.pot from source
I18N: Add Dutch translation