Bugfix: Add a missing CMake-config file.

git-svn-id: https://assimp.svn.sourceforge.net/svnroot/assimp/trunk@1257 67173fc5-114c-0410-ac8e-9d2fd5bffc1f

assimp-config-version.cmake.in

@@ -0,0 +1,12 @@
+set( PACKAGE_VERSION "@ASSIMP_VERSION@" )
+if( "${PACKAGE_FIND_VERSION}" VERSION_EQUAL "@ASSIMP_VERSION@")
+  set(PACKAGE_VERSION_EXACT 1)
+endif()
+if( "${PACKAGE_FIND_VERSION_MAJOR}.${PACKAGE_FIND_VERSION_MINOR}" EQUAL "@ASSIMP_SOVERSION@" )
+  set(PACKAGE_VERSION_COMPATIBLE 1)
+elseif( "${PACKAGE_FIND_VERSION_MAJOR}" EQUAL "@ASSIMP_VERSION_MAJOR@" )
+  # for now backward compatible if minor version is less
+  if( ${PACKAGE_FIND_VERSION_MINOR}  LESS @ASSIMP_VERSION_MINOR@ )
+    set(PACKAGE_VERSION_COMPATIBLE 1)
+  endif()
+endif()