Update elements_parser.js

slicing one by one, doesn't make the array bigger. so the index value is still effective.
If you slice by 0 the array grows up and so index loose meaning.
Update elements_parser.js
Merge pull request #1502 from asturur/fix-ordering-of-the-pieces

Fix ordering of SVG parsing
Merge pull request #5 from kangax/master

sync to head