Scripts and documentation to prep data and train model

[bkowshik]

Per https://github.com/mapbox/osmcha/pull/5#issuecomment-276727180

Objective

• Scripts and documentation to prep data and train model
• Add useful hyperlinks onto README

[defvol]

Also, can we rename 'Instructions to prep data and train model' to 'Add scripts and docs for data prep and training'? to make it clear that the commit not only adds docs but also the scripts

[bkowshik]

Also, can we rename 'Instructions to prep data and train model' to 'Add scripts and docs for data prep and training'?

This was wonderful to learn about. git is amazing!

Documentation

• Amending older or multiple commit messages

[bkowshik]

LGTM, I fixed the train/test partition in 79d18ff. If that works for you we can merge.

@rodowi, I did the commit message rename first and that resulted in your commit go missing. I have added that back with https://github.com/mapbox/gabbar/pull/3/commits/ce904ace79e471a456979246ac92821dac19453d 😃

[defvol]

and that resulted in your commit go missing

no worries good that the code was merged