Simplified the download and building of libccmio-2.6.1.

Corrected the building of ccm26ToFoam.
Tested on dm from download to run -- all fine.
Needed to use --no-check-certificate option for wget.

applications/utilities/mesh/conversion/Optional/AllwmakeOptional

@@ -5,8 +5,8 @@ set -x
 # if the library exists, assume there are headers too
 if [ -e $FOAM_LIBBIN/libccmio.so ]
 then
-   $WM_PROJECT_DIR/../ThirdParty/AllwmakeCcmIO
-   wmake ccm26ToFoam
+   ( cd $WM_PROJECT_DIR/../ThirdParty && ./AllwmakeLibccmio ) \
+       && wmake ccm26ToFoam
 fi
 
 # end

applications/utilities/mesh/conversion/Optional/ccm26ToFoam/Make/options

 EXE_INC = \
     -I$(LIB_SRC)/finiteVolume/lnInclude \
     -I$(LIB_SRC)/meshTools/lnInclude \
-    -I$(THIRD_PARTY)/libccmio \
-    -I$(THIRD_PARTY)/libccmio/lnInclude
+    -I${WM_PROJECT_DIR}/../ThirdParty/libccmio-2.6.1 \
+    -I${WM_PROJECT_DIR}/../ThirdParty/libccmio-2.6.1/lnInclude
 
 EXE_LIBS = \
     -lfiniteVolume \