From Philip Lowman, added support for Inventor

CMakeModules/FindInventor.cmake

@@ -0,0 +1,43 @@
+# - Locate Inventor
+# This module defines:
+#  INVENTOR_FOUND, if false, do not try to link against Inventor.
+#  INVENTOR_LIBRARY, the library to link against.
+#  INVENTOR_INCLUDE_DIR, where to find headers.
+
+FIND_PATH(INVENTOR_INCLUDE_DIR Inventor/So.h
+	/usr/local/include
+	/usr/include
+	/sw/include
+	/opt/local/include
+	/opt/csw/include
+	/opt/include
+)
+
+FIND_LIBRARY(INVENTOR_LIBRARY
+    NAMES Coin
+    PATHS
+    /usr/local/lib
+    /usr/lib
+    /sw/lib
+    /opt/local/lib
+    /opt/csw/lib
+    /opt/lib
+)
+IF(NOT INVENTOR_LIBRARY)
+    # If we can't find libCoin try libInventor
+    FIND_LIBRARY(INVENTOR_LIBRARY
+        NAMES Inventor
+        PATHS
+        /usr/local/lib
+        /usr/lib
+        /sw/lib
+        /opt/local/lib
+        /opt/csw/lib
+        /opt/lib
+    )
+ENDIF(NOT INVENTOR_LIBRARY)
+
+SET(INVENTOR_FOUND "NO")
+IF(INVENTOR_INCLUDE_DIR AND INVENTOR_LIBRARY)
+	SET(INVENTOR_FOUND "YES")
+ENDIF(INVENTOR_INCLUDE_DIR AND INVENTOR_LIBRARY)