Remove deprecated VariationalProblem (fixes Issue #239)
Remove deprecated functions from GenericDofMap (fixes Issue #202)
Remove deprecated UnitCircle{Mesh} (fixes Issue #201)
Remove UnitFoo meshes (fixes Issue #203)
Remove import of removed module 'variationalproblem'
Add IntervalMesh.h to dolfin_generation.h
Merge branch 'garth/fix-issue-201' into garth/fix-issue-203

Fix old code in book test.

Conflicts:
	dolfin/generation/dolfin_generation.h
	dolfin/swig/shared_ptr_classes.i
Merge branch 'garth/fix-issue-203'
Merge branch 'garth/fix-issue-202'
Merge branch 'garth/fix-issue-239'
Merge branch 'master' into garth/fix-issue-119

Conflicts:
	dolfin/fem/DofMap.cpp