title: Disable column editing in rhandsontable?
body: <p>Suppose I have the following shiny app:</p>
  
  <pre><code>library(shiny)
  library(rhandsontable)
  
  ui &lt;- shinyUI(fluidPage(
    titlePanel("Handsontable"),
    sidebarLayout(
      sidebarPanel(
        helpText("Handsontable demo output. Column add/delete does work ",
                 "for tables with defined column properties, including type."),
        radioButtons("useType", "Use Data Types", c("TRUE", "FALSE"))
      ),
      mainPanel(
        rHandsontableOutput("hot", width = 350)
      )
    )
  ))
  
  server &lt;- shinyServer(function(input, output, session) {
    values = reactiveValues()
  
    data = reactive({
      if (!is.null(input$hot)) {
        DF = hot_to_r(input$hot)
      } else {
        if (is.null(values[["DF"]]))
          DF = data.frame(val = 1:10, bool = TRUE, nm = LETTERS[1:10],
                          dt = seq(from = Sys.Date(), by = "days", length.out = 10),
                          stringsAsFactors = F)
        else
          DF = values[["DF"]]
      }
  
  
      values[["DF"]] = DF
      DF
    })
  
    output$hot &lt;- renderRHandsontable({
      DF = data()
      if (!is.null(DF))
        rhandsontable(DF, useTypes = as.logical(input$useType), stretchH = "all")
    })
  })
  
  # Run the application 
  shinyApp(ui = ui, server = server)
  </code></pre>
  
  <p>How can I disable editing for the first two columns?</p>