Merge pull request #508 from alloy/master

[Objective-C] No longer ignore `xcworkspace` documents.

Objective-C.gitignore

@@ -9,8 +9,6 @@
 !default.mode2v3
 *.perspectivev3
 !default.perspectivev3
-*.xcworkspace
-!default.xcworkspace
 xcuserdata
 profile
 *.moved-aside