min/max works with support; fixes #6, fixes #7
mode and support forgot to be properties
Fixing rv mode, reworking symbolic indicators
Pspaces are a bit more symbolic

In addition, fixing a bug with the .F property
Powerset returns frozensets
Pspaces are more symbolic and error-catching
Real is more symbolic
Many new (and failing) tests
Git-ignoring vim's .swp files