control network to_isis and from_isis expect different column names in the df

[jessemapel]

The from_isis method creates a df with column names that match the ISIS protobuf spec. The to_isis method expects a df with different column names. This means you cannot do the following:

df = from_isis(`some.net`)
do things to df
to_isis(df, `some_modified.net`)

[jessemapel]

This may be the cause of #111

[jlaura]

Labelled as a bug since we should be able to roundtrip inside of plio. Consumers of plio that need to do formatting should be doing that formatting locally.

[acpaquette]

@jessemapel Looks like the case you outlined in the original issue was fixed by #131. However the split between measure columns and point columns outlined in #122 may no longer be present

[jessemapel]

That is a problem then. There are fields on the measures and points that have the same name. if they don't have the prefixes any more then things are not going to write out correctly.