Added revised functions for handling texture files

include/devil1tex.h

@@ -2,7 +2,7 @@
 #define DEVIL1TEX_H
 
 #include <stdint.h>
-
+#include <stdbool.h>
 #pragma pack(push, 1)
 // disable struct padding
 // to easily impose struct on plain data.
@@ -56,4 +56,19 @@ void locatetextures(unsigned int*,
                     struct TexturePack*,
                     struct TextureBatchDescriptor**);
 
+bool gettexdescriptor(struct TextureBatchDescriptor**,
+                      unsigned int,
+                      const char *,
+                      unsigned int);
+
+bool gettexbatch(struct TextureBatch**, 
+                 unsigned int, 
+                 const char*,
+                 unsigned int);
+
+bool unpacktexbatch(struct Texture*,
+                    unsigned int,
+                    const char*, 
+                    const unsigned int);
+
 #endif