core-scala toPipeline logLevel support (#83)

* core-scala toPipeline logLevel support

* examples README.md update

core-scala/src/main/scala/io/pdal/pipeline/PipelineConstructor.scala

@@ -16,8 +16,7 @@
 
 package io.pdal.pipeline
 
-import io.pdal.Pipeline
-
+import io.pdal.{LogLevel, Pipeline}
 import io.circe.{Decoder, Encoder, Json}
 import io.circe.syntax._
 
@@ -30,6 +29,7 @@ case class PipelineConstructor(list: List[PipelineExpr]) {
   def ~(e: Option[PipelineExpr]): PipelineConstructor = e.fold(this)(this ~ _)
   def map[B](f: PipelineExpr => B): List[B] = list.map(f)
   def toPipeline: Pipeline = Pipeline(this.asJson.noSpaces)
+  def toPipeline(logLevel: LogLevel.Value): Pipeline = Pipeline(this.asJson.noSpaces, logLevel)
 }
 
 object PipelineConstructor {

examples/pdal-jni/README.md

@@ -1,4 +1,8 @@
 # PDAL JNI usage example
 
-To run this demo just launch `./sbt run` command and choose `1` 
-to run a basic `pdal-core` example, choose `2` to run a basic `pdal-core` example in Java, and choose `3` to run as basic `pdal-scala` example.
+To run this demo just launch `sbt run` command and choose:
+
+* `1` to run a basic `pdal-core` example
+* `2` to run a basic `pdal-core` example in Java
+* `3` to run a basic `pdal-core` example with the debugging log level configured
+* `4` to run as basic `pdal-scala` example

examples/pdal-jni/src/main/scala/com/azavea/MainLogging.scala

@@ -1,5 +1,9 @@
+package com.azavea
+
 import io.pdal.Pipeline
 
+import io.pdal._
+
 object MainLogging {
   val json =
     """