Make the DataFrame names consistent

[zaleslaw]

https://kotlin.github.io/dataframe/overview.html#what-is-data-frame

Now we could have

• Kotlin Data Frame
• Kotlin Dataframe
• dataframe
• Kotlin DataFrame
• DataFrames
• dataframes

[Jolanrensen]

To summarize, we should have either:

• "Kotlin DataFrame"/"the Kotlin DataFrame library"
  • or "DataFrame" to reduce repeating ourselves in a piece of text.
• "a dataframe"/"dataframes" the concept or instance of the interface DataFrame
• the interface/type "DataFrame"
  • Should be surrounded by `

And not:

• ~Kotlin Data Frame~
• ~Kotlin Dataframe~
• ~DataFrames~

Are these all cases?