Gate of Aqebi Expansion for Khet 1.0

This is a new expansion for Khet 1.0: The Gate of Aqebi.

My original inspiration was to make a game piece that could block and die like an Obelisk or could rotate and "hide" from the laser. However, once I started researching Egyptian gates, I came across the Book of Gates and found some interesting ancient writings about the Gate of Aqebi. (http://www.ancientegyptonline.co.uk/bookgates2.html) As a result I have decided on a slightly different set of rules.

##Rules
1) The Gate of Aq