Extend up/down symmetry option (add remaining topologies, support for separate HFS/LFS SOL width, documentation) #42
Description
Up/down symmetry option has been added for SNL and some snowflake configurations (#37). The following should be done to finish off this work:
- this option should be extended to all topologies supported by INGRID
- documentation of this option should be added
- currently only the lower half of the domain is kept, but it may sometimes be useful to keep only the upper half instead
- currently for lower single null cases, the SOL width on the HFS and LFS are the same and set by psi_1. Instead, the SOL width on each side could be specified separately using psi_1 and psi_2