Update scala compiler to 2.11.7

Update scala version to fix bug concerning case classes in package
objects. Also use newer scala-maven-plugin that fully support scala
2.11.

Fixes peelframework#78

NOTICE

@@ -53,10 +53,12 @@ This project includes:
   peel-flinkspark-bundle under The Apache License, Version 2.0
   peel-spark-bundle under The Apache License, Version 2.0
   pegdown under Apache 2
-  quasiquotes under BSD-like
-  Scala Compiler under BSD-like
-  Scala Library under BSD-like
+  Scala Compiler under BSD 3-Clause
+  Scala Library under BSD 3-Clause
   scala-arm under BSD-Style
+  scala-continuations-library under BSD 3-clause
+  scala-parser-combinators under BSD 3-clause
+  scala-xml under BSD 3-clause
   scalacheck under BSD-style
   ScalaTest under the Apache License, ASL Version 2.0
   scalaz-concurrent under BSD-style

pom.xml

@@ -78,7 +78,7 @@
         <encoding>UTF-8</encoding>
         <!-- Maven Plugins -->
         <maven-eclipse-plugin.version>2.9</maven-eclipse-plugin.version>
-        <scala-maven-plugin.version>3.1.6</scala-maven-plugin.version>
+        <scala-maven-plugin.version>3.2.1</scala-maven-plugin.version>
         <build-helper-maven-plugin.version>1.7</build-helper-maven-plugin.version>
         <maven-surefire-plugin.version>2.7</maven-surefire-plugin.version>
         <scalatest-maven-plugin.version>1.0-RC2</scalatest-maven-plugin.version>
@@ -95,8 +95,8 @@
         <maven.compiler.source>${java.version}</maven.compiler.source>
         <maven.compiler.target>${java.version}</maven.compiler.target>
         <!-- Scala -->
-        <scala.version>2.10.5</scala.version>
-        <scala.tools.version>2.10</scala.tools.version>
+        <scala.version>2.11.7</scala.version>
+        <scala.tools.version>2.11</scala.tools.version>
         <!-- Spring -->
         <spring-beans.version>4.0.5.RELEASE</spring-beans.version>
         <!-- Akka -->
@@ -106,7 +106,7 @@
         <!-- Testing -->
         <junit.version>4.11</junit.version>
         <scalatest.version>2.1.7</scalatest.version>
-        <specs2.version>2.3.10</specs2.version>
+        <specs2.version>2.3.11</specs2.version>
         <scalacheck.version>1.12.2</scalacheck.version>
         <!-- Config -->
         <config.version>1.2.1</config.version>