pager.h: move declarations for pager.c functions from cache.h

Signed-off-by: Elijah Newren <newren@gmail.com>
Acked-by: Calvin Wan <calvinwan@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

pager.c

@@ -1,10 +1,13 @@
 #include "cache.h"
 #include "config.h"
 #include "editor.h"
+#include "pager.h"
 #include "run-command.h"
 #include "sigchain.h"
 #include "alias.h"
 
+int pager_use_color = 1;
+
 #ifndef DEFAULT_PAGER
 #define DEFAULT_PAGER "less"
 #endif