Ignore a type but still document its fields when embedded

[justenstall]

#73 changed (fixed) the behavior of ignoreTypes so that they are actually excluded from the output. I was previously using the ignoreTypes list to ignore types that are only embedded in other structs. The types would not receive their own section/table in the resulting docs, but their fields would still be documented when they were embedded in other structs (with json:",inline"). It would be nice if this use case could be supported in the tool.