Merge branch 'cleanup/remove-tutorial' into 'master'

CMakeLists.txt

tutorial/CMakeLists.txt

tutorial/README.md

tutorial/ex1/CMakeLists.txt

tutorial/ex1/README.md

tutorial/ex1/exercise1.cc

tutorial/ex1/exercise1.input

tutorial/ex1/exercise1_2p.cc

tutorial/ex1/exercise1_2p2c.cc

tutorial/ex1/injection2p2cproblem.hh

tutorial/ex1/injection2pniproblem.hh

tutorial/ex1/injection2pproblem.hh

tutorial/ex1/injection2pspatialparams.hh

tutorial/ex2/CMakeLists.txt

tutorial/ex2/README.md

tutorial/ex2/exercise2.cc

tutorial/ex2/exercise2.input

tutorial/ex2/injection2p2cproblem.hh

tutorial/ex2/injection2p2cspatialparams.hh

tutorial/ex2/mylocalresidual.hh