Questions text added for the 11th chapter
Merge remote-tracking branch 'origin/develop' into develop

Conflicts:
	src/main/scala/chapter11/exc01.txt
	src/main/scala/chapter11/exc02.txt
	src/main/scala/chapter11/exc03/Fraction.scala
	src/main/scala/chapter11/exc05/Table.scala
Small bug in scaladoc fixed