Merge pull request #1829 from 9rnsr/fix9773

Issue 9773 - ref parameter with default string literal should not compile
Merge branch 'master' of github.com:D-Programming-Language/dmd
Merge branch 'master' of github.com:D-Programming-Language/dmd
Merge branch 'master' of github.com:D-Programming-Language/dmd
Merge branch 'master' of github.com:D-Programming-Language/dmd
Merge branch 'master' of github.com:D-Programming-Language/dmd
Merge branch 'master' of github.com:D-Programming-Language/dmd
fix Issue 8081 - pure nothrow unittest problem in generated 'header' file
Merge branch 'master' of github.com:D-Programming-Language/dmd
Merge branch 'master' of github.com:D-Programming-Language/dmd
Merge branch 'master' of github.com:D-Programming-Language/dmd
Merge branch 'master' of github.com:D-Programming-Language/dmd
Merge branch 'master' of github.com:D-Programming-Language/dmd
Merge branch 'master' of github.com:D-Programming-Language/dmd
fix Issue 10005 - struct variable declaration and const-correctness
fix Issue 10047 - opDispatch instantiation failure should be gagged for UFCS
Add C++ mangling of struct and class names for member variables and functions
Issue 6545 - [CTFE] Hard-coded array operations not yet supported

Refactor array op generation and always generate a D version of the array operation.  In the interpreter, if a FuncDeclaration with no body is encoutered, use the D version if it is an array operation.
Add Xcode project.
Add backend-independent stub glue layer