bump scala version in build and plan

.travis.yml

@@ -2,11 +2,11 @@ sudo: required
 dist: trusty
 
 language: scala
-scala: 2.11.8
+scala: 2.12.3
 
 before_install:
  - sudo apt-get update -q
  - sudo apt-get install texlive-full texlive-latex-extra texlive-lang-all texlive-lang-swedish -y
 
-script: 
+script:
  - sbt build

build.sbt

@@ -7,13 +7,13 @@ lazy val hello = taskKey[Unit]("Prints welcome message")
 
 hello := {
   println("===== WELCOME to the sbt build of lunduniversity/introprog =====")
-  println("\nHAVE PATIENCE: build times can be > 280 sec on a fast machine... \n ")
+  println("\nHAVE PATIENCE: full build can take >500sec on a 2.5GHz machine...\n")
 }
 
 lazy val commonSettings = Seq(
   organization := "se.lth.cs",
-  version := "16.1",
-  scalaVersion := "2.11.8"
+  version := "2017-snapshot",
+  scalaVersion := "2.12.3"
 )
 
 lazy val plan = (project in file("plan")).
@@ -81,7 +81,7 @@ pdf := {
   println("\n=== The main doc with all stuff in one pdf optimized for screen:")
   runPdfLatexCmd(texFile = file("compendium.tex"), workDir = file("compendium"))
 
-  println("\n=== Docs optimized for print, two times for xref aux info:")
+  println("\n=== Docs optimized for print, two times for external xref to work:")
   runPdfLatexCmd(texFile = file("compendium1.tex"), workDir = file("compendium"))
   runPdfLatexCmd(texFile = file("compendium2.tex"), workDir = file("compendium"))
 

plan/build.sbt

@@ -2,11 +2,10 @@ import sbt._
 import Process._
 import Keys._
 
-lazy val plan = (project in file(".")). 
+lazy val plan = (project in file(".")).
   settings(
     name := "plan",
-    scalaVersion := "2.11.8",
+    scalaVersion := "2.12.3",
     // https://github.com/typesafehub/sbteclipse/wiki/Using-sbteclipse#skipproject
-    EclipseKeys.skipProject := true  
+    EclipseKeys.skipProject := true
  )
-

quiz/project/build.properties

@@ -1 +1 @@
-sbt.version=0.13.15
+sbt.version=0.13.16