Detect Obj-C header files

[kklemon]

Because C and Objective-C have the same filename extension, atom detects .h always as C header files. At least in my case.

So i wonder if we should or could implement some logic that searches for a corresponding .m file with the same filename, or within the same folder or project when a .h file is opened, and sets the file type res. language to Objective-C.

[winstliu]

Currently all that Atom does is look for a matching filetype and doesn't perform any additional analysis after that. See #5 for a similar issue.