Initial (full) table support for -Tgemini.  This renders the table in a literal context.  (Also fixed is that literal contexts weren't properly terminating the initial ``` field.)  This allows in-table links by temporarily disabling in-line links, if applicable, to defer links til after the table.
Initial (full) table support for -Tgemini.  This renders the table in a
literal context.  (Also fixed is that literal contexts weren't properly
terminating the initial ``` field.)  This allows in-table links by temporarily
disabling in-line links, if applicable, to defer links til after the table.

kristapsdz/lowdown,kristapsdz/lowdown,kristapsdz/lowdown