First commit of partial RosettaCode contents.

Pushing this for testing purposes. Lots of work still needed.

Task/Pi/Scala/pi.scala

@@ -0,0 +1,35 @@
+object Pi {
+  class PiIterator extends Iterable[BigInt]{
+    var r:BigInt=0
+    var q, t, k:BigInt=1
+    var n, l:BigInt=3
+    var nr, nn:BigInt=0
+		
+    def iterator: Iterator[BigInt]=new Iterator[BigInt]{
+      def hasNext=true
+      def next():BigInt={
+        while((4*q+r-t) >= (n*t)) {
+          nr = (2*q+r)*l
+          nn = (q*(7*k)+2+(r*l))/(t*l)
+          q = q * k
+          t = t * l
+          l = l + 2
+          k = k + 1
+          n  = nn
+          r  = nr			
+        }
+        val ret=n
+        nr = 10*(r-n*t)
+        n  = ((10*(3*q+r))/t)-(10*n)
+        q  = q * 10
+        r  = nr
+        ret
+      }
+    }
+  }
+
+  def main(args: Array[String]): Unit = {
+    val it=new PiIterator
+    println((it head) + "." + (it take 300 mkString))
+  }
+}