- rewrote p_local.h so that it doesn't pull in the entire bunch of headers.

This was to resolve some circular dependencies with the portal code.
The most notable changees:

 * FTextureID was moved from textures.h to doomtype.h because it is frequently needed in files that don't want to do anything with actual textures.
 * split off the parts from p_maputl into a separate header.
 * consolidated all blockmap related data into p_blockmap.h
 * split off the polyobject parts into po_man.h

src/b_func.cpp

@@ -11,6 +11,7 @@
 #include "doomdef.h"
 #include "doomstat.h"
 #include "p_local.h"
+#include "p_maputl.h"
 #include "b_bot.h"
 #include "g_game.h"
 #include "m_random.h"
@@ -20,6 +21,8 @@
 #include "i_system.h"
 #include "s_sound.h"
 #include "d_event.h"
+#include "d_player.h"
+#include "p_spec.h"
 
 static FRandom pr_botdofire ("BotDoFire");