VTK formats, distributed mesh and synchronizer

Closes #52 (closed) and #73 (closed).

cmake/FindMETIS.cmake

+# This module will try to find METIS and define the following:
+#  METIS_FOUND - True iff METIS was found
+#  METIS_INCLUDE_DIRS - METIS include directories
+#  METIS_LIBRARIES - METIS library paths
+
+find_path(METIS_INCLUDE_DIR metis.h
+          PATHS /usr/include /usr/local/include
+          DOC "METIS include directory")
+
+find_library(METIS_LIBRARY metis
+             PATHS /usr/lib /usr/local/lib ${PROJECT_SOURCE_DIR}/metis
+             DOC "Path to METIS library")
+
+include(FindPackageHandleStandardArgs)
+# handle the QUIETLY and REQUIRED arguments and set METIS_FOUND to TRUE
+# if all listed variables are TRUE
+find_package_handle_standard_args(METIS  DEFAULT_MSG
+                                  METIS_LIBRARY METIS_INCLUDE_DIR)
+
+mark_as_advanced(METIS_INCLUDE_DIR METIS_LIBRARY)
+
+set(METIS_LIBRARIES ${METIS_LIBRARY})
+set(METIS_INCLUDE_DIRS ${METIS_INCLUDE_DIR})