Generating a cloud mask using the R-Client

[florian.lahn]

1. the indexing: R supports both (by index and name), but does not automatically know what the back-end supports in this function
2. Thanks Peter for the quick response. I have also looked into it and the operators ==, | and & should work for chaining and logical operators. However, not with the current release on CRAN. I had to make some fixes. So, now you can find updates in the develop branch on Github.

This would be the filterSCL can look more elegantly like this:

filterSCL = function(data, context) {
    scl = data[5]
    res = scl == 3 | scl == 8 | scl == 9
    return(res)
}