Fix #59; Allow & in command desc
#139
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Fix #59
This fix is pretty limited though. A better fix would evaluate the values. For this 1. need to stop using desc to look up the sub-command, 2. don't store the desc for sub-commands, 3. get the desc at runtime (similar to applySetter; but get instead of set). Alternatively, maybe just populate desc field at runtime.
In Nim 1.6 genEnumCaseStmt errors out. It could be fixed by generating an enum case of elements instead of values; it currently sets the enum by value desc if present (which is a bit iffy).