Added methof time_map_fread_alloc_readonly().
Added function enkf_fs_alloc_readonly_time_map().
Added raise IndexError / raise KeyError to EclFile.restart_get_kw().
Merge pull request #308 from joakim-hove/restart-get-kw-throws

Added raise IndexError / raise KeyError to EclFile.restart_get_kw().
Merge pull request #304 from joakim-hove/jpb/read-only-timemap

Read Only TimeMap