Bug: missing `include` support

[Andrei-Pozolotin]

here:
https://github.com/akka-js/shocon#shocon
it says drop-in replacement but that that is not true :-)

drop-in replacement wherever the Java implementation is not available

example:

    val text = """
    include "main.conf"
    """
    val config = ConfigFactory.parseString( text )

execution result:

java.lang.Error: (keyValueSeparator ~/ jsonExpr | obj.rep(1, sep = nlspace) ~ space):4:24 ..."\n    "
        at java.lang.StackTrace$.currentStackTrace(Unknown Source)
        at java.lang.Throwable.fillInStackTrace(Unknown Source)
        at java.lang.Throwable.init(Unknown Source)
        at java.lang.Error.init(Unknown Source)
        at java.lang.Error.init(Unknown Source)
        at eu.unicredit.shocon.package$Config$.apply(Unknown Source)
        at com.typesafe.config.ConfigFactory$.parseString(Unknown Source)
        at com.carrotgarden.scalor.test.Main$.main(Unknown Source)
        at <none>.main(Unknown Source)
        at <none>.__libc_start_main(Unknown Source)
        at <none>._start(Unknown Source)

[andreaTP]

this is correct, I will rephrase drop-in replacement with something, obviously in this case keeping the semantics over Scala.Js is extremely complicated and full of caveats