Add C, C++, Objective-C and Java to the list of languages in the code app

www/common/modes.js

@@ -10,6 +10,8 @@ define([
         "ASN.1 asn.1",
         "Asterisk asterisk",
         "Brainfuck brainfuck .b",
+        "C text/x-csrc .c",
+        "C text/x-c++src .cpp",
         "C-like clike",
         "Clojure clojure",
         "CMake cmake",
@@ -48,6 +50,7 @@ define([
         "HTTP http",
         "IDL idl",
         "JADE jade",
+        "Java text/x-java .java",
         "JavaScript javascript .js",
         "Jinja2 jinja2",
         "JSX jsx .jsx",
@@ -65,6 +68,7 @@ define([
         "Nginx nginx",
         "NSIS nsis",
         "N-Triples ntriples",
+        "Objective-C text/x-objectivec .m",
         "Octave octave",
         "Org-mode orgmode .org",
         "Oz oz",