Generate API docs from source code comments (#2491)

* Generate api docs from source code

* Add a bunch of doxygen comments

* more doxygen comments

* Add the in-progress api docs

* script to generate docs from travis

* Add doc generation to the travis job

* make travis_docs.sh commit the work it does

* make sure the docs script exits cleanly

tmk_core/common/command.h

@@ -18,6 +18,8 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #ifndef COMMAND_H
 #define COMMAND
 
+/* FIXME: Add doxygen comments for the behavioral defines in here. */
+
 /* TODO: Refactoring */
 typedef enum { ONESHOT, CONSOLE, MOUSEKEY } command_state_t;
 extern command_state_t command_state;
@@ -154,4 +156,4 @@ bool command_proc(uint8_t code);
 #define XMAGIC_KC(key) KC_##key
 #define MAGIC_KC(key) XMAGIC_KC(key)
 
-#endif
+#endif