add m.idsToValues("id") interpreting vals for ids

generates an object that can be used to state ids without quotes
scala> backlog.todo.idsToValues("id")
defined module id
res5: scala.tools.nsc.interpreter.IR.Result = Success

scala> id.<TAB>
ConstrToScala       asInstanceOf        isInstanceOf
jacopConstr         modelHistory        pandoc
prioRange           setupTeardown       submodelConstr
toHtmlOfSubmodel    toMarkdown
toString            toTableOfSubmodel
trippleQuotes
fix fileutils in package.scala

cd, ls, pwd etc
better handling of absolute and relative paths