Implement guided analyses

[tmcd82070]

Implement guided line transect and point transect analyses. These would be functions that prompt the user for choices in analysis. Choices like "Sightings input file", "transects input file", "Which column is your 'transect' designator?", etc. This would be all text based in the console.

Later, this would form the basis for a Shiny app, perhaps in a separate package (RDistanceGui ? ).

[jcarlis3]

WGFD overhauled our shiny app built on top of Rdistance and pronghornLT to facilitate survey design, data formatting and QAQC, and analysis using Rdistance. It's built for our specific data pipeline and use case, but may well jumpstart an effort towards a more-general shiny app. You should already have access to the private app repo. Drop me a line if you're not @tmcd82070 but are also interested in WGFD app.