Generate version information to version.h

So that only the files that really needs a version are recompiled.

keyboards/ergodox/keymaps/algernon/keymap.c

@@ -12,6 +12,7 @@
 #include "keymap_plover.h"
 #include "eeconfig.h"
 #include "wait.h"
+#include "version.h"
 
 /* Layers */
 

keyboards/ergodox/keymaps/default/keymap.c

@@ -1,6 +1,7 @@
 #include "ergodox.h"
 #include "debug.h"
 #include "action_layer.h"
+#include "version.h"
 
 #define BASE 0 // default layer
 #define SYMB 1 // symbols

keyboards/ergodox/keymaps/josh/keymap.c

@@ -1,6 +1,7 @@
 #include "ergodox.h"
 #include "debug.h"
 #include "action_layer.h"
+#include "version.h"
 
 #define BASE 0 // default layer
 #define SYMB 1 // symbols

keyboards/planck/keymaps/cbbrowne/keymap.c

@@ -4,6 +4,7 @@
 #endif
 #include "config.h"
 #include "quantum.h"
+#include "version.h"
 
 /* Each layer is given a name to aid in readability, which is then
    used in the keymap matrix below.  The underscores do not denote 

keyboards/planck/keymaps/experimental/keymap.c

@@ -8,6 +8,7 @@
 #endif
 
 #include "eeconfig.h"
+#include "version.h"
 
 extern keymap_config_t keymap_config;