Support for tf df trees #181

[tlapusan]

@parrt it contains the visualisations for Random Forest algo. The tensorflow DF contains more algorithms for decision forests and we can add them also in the future.

close #181

[parrt]

hooray!!! The tfdf prefix looks very much like the common term tfidf... Perhaps we change that to simply prefix of tf everywhere?

[parrt]

There are a couple of changes such as in interpretation.py that might affect other targets. Have you run through and checked the other kinds of trees and run tests?

[tlapusan]

There are a couple of changes such as in interpretation.py that might affect other targets. Have you run through and checked the other kinds of trees and run tests?

yes, I spent some time for these changes and ran/tested all of them :)

[tlapusan]

hooray!!! The tfdf prefix looks very much like the common term tfidf... Perhaps we change that to simply prefix of tf everywhere?

agree, I will rename them soon.

[parrt]

Thanks, @tlapusan !