- blinn attributes have to ordered on writing 
- there is no flow="OUT" in accessor - param so I removed it (maybe that was from an older collada version?)
- material-name is without #
- input attribute is called offset not idx 
Also a little cleanup to avoid redundant code.


git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@3817 dfc29bdd-3216-0410-991c-e03cc46cb475