EMACS: c-mode keys

* Mapped <Return> to c-indent-new-comment-line followed by a
    c-indent-line-or-region.

  * Mapped <C-return> to newline, since c-indent-new-comment-line
    inserts a \ at the end of #define statements and #include
    statements which makes the compiler think the line continues on
    the next.

emacs.d/20-c-mode.el

@@ -1,3 +1,9 @@
 (add-hook 'c-mode-hook
           (lambda ()
-            (local-set-key [f11] 'c-toggle-header-source)))
+            (local-set-key [f11] 'c-toggle-header-source)
+            (local-set-key "\C-m"
+                           (lambda ()
+                             (interactive)
+                             (c-indent-new-comment-line)
+                             (c-indent-line-or-region)))
+            (local-set-key [C-return] 'newline)))