fixed: resize arrays before insertions
Merge pull request #57 from akva2/resize_arrays

fixed: resize arrays before insertions
changed: reprioritize material properties from .grdecl

only take PERMX and PORO as elastic material properties as last resort

requested by kari b. skjerve through email
Merge pull request #58 from akva2/reprioritize_material_props

changed: reprioritize material properties from .grdecl