Changed the device creation to make more use of SIrrlichtCreationParameters. This should increase maintainability and ease addition of more configurable properties. The windows devices need to be adapted still, but should compile for now...

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@1369 dfc29bdd-3216-0410-991c-e03cc46cb475