Pushed to oz_linden/391-blizzard
0cacb52 merge changes for XCODE-7
bcb3712 Supress error after Xcode 7 update: error: null passed to a callee that requires a non-null argument
a2eee9d comment out LL_DEBUGS that fails because 'expression evalauted desipite being used as an operand to typeid'
9a48b85 Turn off (for now) the warnings/errors that result from Boost.Units usage
d61801c Update version of Xcode (7.0) and SDKs (10.11)