new accessors

[lindsayplatt]

Currently you can get limits, x and y axis labels, log logic, summary of each view, and metadata info. Would be useful to know how many plot features have been added to each view.

Currently:

• xlab, ylab
• xlim, ylim, lim
• logged
• view_info
• whatDate
• whatVersion

[lindsayplatt]

repgen desires count accessors ("there are N number of features on view.1.2")

[thongsav-usgs]

"inverted" function similar to logged also desired

[thongsav-usgs]

Please expand xlab and ylab to include data form gsplot$global$title, currently only includes labels from each side.

[thongsav-usgs]

getLegendEntries (mainly interested in the text, but other info would be nice too)

[jordansread]

Before we get too far down the line with mixing public functions "named_like_this" with others "namedLikeThis", can we converge on the naming style and stick with it?

[ldecicco-USGS]

First they told me only use camelCase....then they told me never use camelCase....now they tell me to use camelCase again.

I think the majority in this package are using underscores, so yeah, let's stick with that here.