Merge pull request #590 from mcmonkey4eva/master

More pull and more request
Update HeadCommand, add to dMaterials
Start to add identifySimple() (will finish in next commit, but need to sync)
Make WorldScriptHelper use identifySimple()
add add'l identifySimple() methods
More identify() -> identifySimple()
Fix context tags not working on some cases when using 'inject'.

Damn you missing return;!
Ensure dItems are fetched correctly

if a property description string gets sent through to dItem.valueOf,
send it back to the object fetcher where it belongs.
Todo: Matching code for other adjustable dObjects, perhaps?
Merge branch 'master' of https://github.com/aufdemrand/Denizen