Moved most USER string functions to dlls/user.
Cleaned up a few more inter-dll dependencies.

diff --git a/dlls/kernel/kernel_main.c b/dlls/kernel/kernel_main.c
index 67121ab..dfc6b8d 100644
--- a/dlls/kernel/kernel_main.c
+++ b/dlls/kernel/kernel_main.c
@@ -98,3 +98,10 @@
     }
     return TRUE;
 }
+
+/***********************************************************************
+ *		KERNEL_nop
+ *
+ * Entry point for kernel functions that do nothing.
+ */
+LONG WINAPI KERNEL_nop(void) { return 0; }