SpriteFactory class added

Handles loading images into textures and creating sprites for them
Modified .gitignore
Added *.db to .gitignore
Modified .gitignore
Added *.db to .gitignore
Merge remote-tracking branch 'origin/font_and_sprite_factories' into dev

Conflicts:
	StrikerClone.depend
	bin/Release/StrikerClone.exe
Merge remote-tracking branch 'origin/dev' into Ship-Class