Add separate header-files for each page/view

Yet another step towards removing cgit.h.

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

ui-log.h

@@ -0,0 +1,7 @@
+#ifndef UI_LOG_H
+#define UI_LOG_H
+
+extern void cgit_print_log(const char *tip, int ofs, int cnt, char *grep,
+			   char *pattern, char *path, int pager);
+
+#endif /* UI_LOG_H */