Initial implementation of Mac/iOS UrlOptions
Untested/uncompiled UrlOptions on MSW; no timeout
Implemented UrlOptions timeout on MSW
added UrlLoadExc, throwing it in UrlImplCocoa
moved return statements into @synchronized directive
Merge pull request #248 from reakinator/url_exception

Url exception throwing in Cocoa
Merge remote-tracking branch 'origin/UrlOptions' into appRewrite
Fixing objc exception boundary issue, minor cleanup on UrlOptions exception throwing