Add UltiSnip snippet for CreateItem

It seems like the CreateItem function is just trying to replicate a
snippet (and failing). Added an UltiSnip dir and a snippet for it.
Maybe add one that automatically generates a password?
Added indentation to the UltiSnip snippet.
Tabs are spaces.

Use 2 spaces instead of tabs in the Ultisnip snippets.
Merge pull request #2 from pjrt/master

Add UltiSnip snippet for CreateItem.