some fixes for Exodus writing of 2D topologies
don't reinstatiate writer at every perform_write()
add missing adaptations in Exodus header
fixes for 1D meshes, don't dynamically allocate tmp array
replaced a bunch of int's by size_t's
be consistent with the FEniCS variable name scheme
activate Exodus unit test
Formatting fixes.
Small fixes.
Merge branch 'nschloe/exodus'