Corrected many #includes for header files (where they are included).

Moved the includes for Lua headers to the .cc files so they are
not needlessly, repeatedly included.

Similarly, moved some standard headers to the .cc files and reorganized
includes to be uniform for all nse_* source files.

Fixed whitespace (removed tabs).

nse_main.h

@@ -1,18 +1,17 @@
 #ifndef NMAP_LUA_H
 #define NMAP_LUA_H
 
-extern "C" {
-#include "lua.h"
-#include "lualib.h"
-#include "lauxlib.h"
-}
-
 #include <vector>
 #include <list>
 #include <string>
 #include <string.h>
 #include <iostream>
 
+extern "C" {
+  #include "lua.h"
+  #include "lauxlib.h"
+}
+
 class ScriptResult
 {
   private: