Revert "Revert to an older version of this plugin"

It turns out this the right thing after all... Let's move back to the
latest code and hope this will be good enough.

This reverts commit a920cc8.

Author: Rahix

Makefile

@@ -1,8 +1,8 @@
 all: file-vtf
 
 
-file-vtf: dxt.h dxt.c vtf.h vtf.c gimp-plugin-vtf.c
-	gcc -Wall -g -o file-vtf dxt.c vtf.c gimp-plugin-vtf.c `pkg-config --cflags --libs gimp-2.0 gimpui-2.0 gtk+-2.0`
+file-vtf: vtf.h vtf.cpp gimp-plugin-vtf.cpp
+	g++ -Wall -g -Wno-write-strings -o file-vtf vtf.cpp gimp-plugin-vtf.cpp `pkg-config --cflags --libs gimp-2.0 gimpui-2.0 gtk+-2.0` -Ilibsquish/include -Llibsquish/lib -lsquish -lboost_iostreams
 
 clean:
 	rm -f file-vtf