feat: Support various C++ file extensions

* Objective C++ Source (.mm)
* C++ Source (.cpp, .cxx, .c++, .cc)
* C++ Header (.hpp, .hxx, .h++, .hh)

Author: mbektchiev

lib/pbxFile.js

@@ -1,7 +1,11 @@
 var $path = require('path'),
     util = require('util'),
     M_EXTENSION = /[.]m$/, SOURCE_FILE = 'sourcecode.c.objc',
+    C_EXTENSION = /[.]c$/, C_SOURCE_FILE = 'sourcecode.c',
     H_EXTENSION = /[.]h$/, HEADER_FILE = 'sourcecode.c.h',
+    MM_EXTENSION = /[.]mm$/, MM_SOURCE_FILE = 'sourcecode.cpp.objcpp',
+    HPP_EXTENSION = /[.](hpp|hxx|h\+\+|hh)$/, CPP_HEADER_FILE = 'sourcecode.cpp.h',
+    CPP_EXTENSION = /[.](cpp|cxx|c\+\+|cc)$/, CPP_SOURCE_FILE = 'sourcecode.cpp.cpp',
     BUNDLE_EXTENSION = /[.]bundle$/, BUNDLE = '"wrapper.plug-in"',
     XIB_EXTENSION = /[.]xib$/, XIB_FILE = 'file.xib',
     DYLIB_EXTENSION = /[.]dylib$/, DYLIB = '"compiled.mach-o.dylib"',
@@ -13,24 +17,40 @@ var $path = require('path'),
 
 function fileTypes() {
     return {
-        SOURCE_FILE: SOURCE_FILE,
-        HEADER_FILE: HEADER_FILE,
-        BUNDLE: BUNDLE,
-        XIB_FILE: XIB_FILE,
-        FRAMEWORK: FRAMEWORK,
-        DYLIB: DYLIB,
-        ARCHIVE: ARCHIVE,
-        PNG_IMAGE: PNG_IMAGE
+		SOURCE_FILE,
+		C_SOURCE_FILE,
+		HEADER_FILE,
+		MM_SOURCE_FILE,
+		CPP_HEADER_FILE,
+		CPP_SOURCE_FILE,
+        BUNDLE,
+        XIB_FILE,
+        FRAMEWORK,
+        DYLIB,
+        ARCHIVE,
+        PNG_IMAGE,
     }
 }
 
 function detectLastType(path) {
     if (M_EXTENSION.test(path))
         return SOURCE_FILE;
 
+    if (C_EXTENSION.test(path))
+        return C_SOURCE_FILE;
+
     if (H_EXTENSION.test(path))
         return HEADER_FILE;
 
+    if (MM_EXTENSION.test(path))
+        return MM_SOURCE_FILE;
+
+    if (CPP_EXTENSION.test(path))
+        return CPP_SOURCE_FILE;
+
+    if (HPP_EXTENSION.test(path))
+        return CPP_HEADER_FILE;
+
     if (BUNDLE_EXTENSION.test(path))
         return BUNDLE;
 
@@ -45,10 +65,10 @@ function detectLastType(path) {
 
     if (ARCHIVE_EXTENSION.test(path))
         return ARCHIVE;
-        
+
     if (PNG_EXTENSION.test(path))
         return PNG_IMAGE;
-        
+
     // dunno
     return 'unknown';
 }
@@ -105,7 +125,7 @@ function pbxFile(filepath, opt) {
     this.sourceTree = opt.sourceTree || defaultSourceTree(this);
     this.fileEncoding = opt.fileEncoding || fileEncoding(this);
 
-    if (opt.weak && opt.weak === true) 
+    if (opt.weak && opt.weak === true)
       this.settings = { ATTRIBUTES: ['Weak'] };
 
     if (opt.compilerFlags) {