JS errors to r

[federiva]

Closes #105

Changes description

• Now we are catching errors in JS and sending them to a server function

Steps to reproduce

Right now we are loading the library from a cdn. In order to test this PR before updating the file used in the CDN please do the following

1. Download this and extract it to the inst/www folder
2. Edit the goslingDependency function in components.R and replace it with the following in order to use a local version of it

goslingDependency <- function() {
  htmltools::htmlDependency(
    name = "gosling",
    version = "0.1.0",
    src = "www",
    package = "shiny.gosling",
    script = "gosling.js"
  )
}

3. Run devtools::load_all()
4. Run an example