Update for PredictionIO 0.12.0-incubating

Closes #16
diff --git a/LICENSE.txt b/LICENSE.txt
new file mode 100644
index 0000000..d645695
--- /dev/null
+++ b/LICENSE.txt
@@ -0,0 +1,202 @@
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diff --git a/build.sbt b/build.sbt
index 782ca74..4ef4d88 100644
--- a/build.sbt
+++ b/build.sbt
@@ -1,7 +1,8 @@
 name := "org.example.textclassification"
+scalaVersion := "2.11.8"
 libraryDependencies ++= Seq(
-  "org.apache.predictionio" %% "apache-predictionio-core" % "0.11.0-incubating" % "provided",
-  "org.apache.spark"        %% "spark-core"               % "1.4.1" % "provided",
-  "org.apache.spark"        %% "spark-mllib"              % "1.4.1" % "provided",
+  "org.apache.predictionio" %% "apache-predictionio-core" % "0.12.0-incubating" % "provided",
+  "org.apache.spark"        %% "spark-core"               % "2.1.1" % "provided",
+  "org.apache.spark"        %% "spark-mllib"              % "2.1.1" % "provided",
   "org.apache.lucene"        % "lucene-core"              % "6.5.1")
diff --git a/src/main/scala/DataSource.scala b/src/main/scala/DataSource.scala
index 82344d0..f4dd11c 100644
--- a/src/main/scala/DataSource.scala
+++ b/src/main/scala/DataSource.scala
@@ -2,14 +2,11 @@
 import org.apache.predictionio.controller.PDataSource
 import org.apache.predictionio.controller.EmptyEvaluationInfo
-import org.apache.predictionio.controller.EmptyActualResult
 import org.apache.predictionio.controller.Params
 import org.apache.predictionio.controller.SanityCheck
-import org.apache.predictionio.data.storage.Event
 import org.apache.predictionio.data.store.PEventStore
 import org.apache.spark.SparkContext
-import org.apache.spark.SparkContext._
 import org.apache.spark.rdd.RDD
 import grizzled.slf4j.Logger
diff --git a/src/main/scala/LRAlgorithm.scala b/src/main/scala/LRAlgorithm.scala
index 6e127c8..e296851 100644
--- a/src/main/scala/LRAlgorithm.scala
+++ b/src/main/scala/LRAlgorithm.scala
@@ -2,17 +2,14 @@
 import org.apache.predictionio.controller.P2LAlgorithm
 import org.apache.predictionio.controller.Params
 import org.apache.spark.SparkContext
-import org.apache.spark.SparkContext._
-import org.apache.spark.rdd.RDD
 import org.apache.spark.ml.classification.LogisticRegression
 import org.apache.spark.sql.DataFrame
 import org.apache.spark.sql.functions
 import org.apache.spark.sql.SQLContext
-import org.apache.spark.sql.UserDefinedFunction
+import org.apache.spark.sql.expressions.UserDefinedFunction
 import grizzled.slf4j.Logger
+import org.apache.spark.mllib.regression.LabeledPoint
 case class LRAlgorithmParams(regParam: Double) extends Params
@@ -34,7 +31,10 @@
     val labels: Seq[Double] = pd.categoryMap.keys.toSeq
-    val data = labels.foldLeft(pd.transformedData.toDF)( //transform to Spark DataFrame
+    val data = labels.foldLeft(pd.transformedData.map { case LabeledPoint(label, feature) =>
+      // Convert old LabeledPoint to ML's LabeledPoint
+      new org.apache.spark.ml.feature.LabeledPoint(label, feature.asML)
+    }.toDF)( //transform to Spark DataFrame
       // Add the different binary columns for each label.
       (data: DataFrame, label: Double) => {
         // function: multiclass labels --> binary labels
@@ -54,7 +54,7 @@
         // Return (label, feature coefficients, and intercept term.
-        (label, LREstimate(fit.weights.toArray, fit.intercept))
+        (label, LREstimate(fit.coefficients.toArray, fit.intercept))
diff --git a/src/main/scala/NBAlgorithm.scala b/src/main/scala/NBAlgorithm.scala
index 6576234..6d5c164 100644
--- a/src/main/scala/NBAlgorithm.scala
+++ b/src/main/scala/NBAlgorithm.scala
@@ -6,7 +6,6 @@
 import org.apache.spark.mllib.classification.NaiveBayes
 import org.apache.spark.mllib.classification.NaiveBayesModel
 import org.apache.spark.mllib.linalg.Vector
-import com.github.fommil.netlib.F2jBLAS
 import scala.math._