working with Hector data

[abigailsnyder]

prototyping working with Hector data for Shiny app

• function to reshape Hector data and chunk it (very simple, written in python https://github.com/JGCRI/stitches/blob/shiny-experimental/R/inst/shinyApp/STITCHES-dashboard/stitches-in-R.Rmd, just need to put in package)
• Hector time series start in 1800 - there's no science reason we couldn't do matching over that window and have a gridded netcdf of an extra 50 years of history. The permutation function just needs some of its assumptions relaxed since right now it is hardcoded to expect 28 time windows I think - need to change for idealized experiments anyway? Maybe there's no utility to an extra 50 years of history but there's probably no reason we can't do it.