script: add a slew of includes all around and drop includes from script.h

Lots of files ended up with indirect includes from script.h.

src/script/compressor.cpp

@@ -4,6 +4,8 @@
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 #include "compressor.h"
+
+#include "key.h"
 #include "script/standard.h"
 
 bool CScriptCompressor::IsToKeyID(CKeyID &hash) const