removed todos and empty lines in Block.hpp

Signed-off-by: Jan Grewe <jan.grewe@g-node.org>
removed todo and minor cleanup in Property.hpp

Signed-off-by: Jan Grewe <jan.grewe@g-node.org>
docstrings for dimension methods

Signed-off-by: Jan Grewe <jan.grewe@g-node.org>
refactoring of user interface classes.
monster commit due to catastrophic rebase :-(
resolved conflicts in EntityWithSources
Added methods that take entities fo front facing Block.hpp
added methods that take entities to DataTag.hpp
added methods that take entities to File.hpp
added methods that take entities to Section.hpp
added methods that take entities to SimpleTag.hpp
added methods that take entities to Source.hpp
Merge pull request #149 from jgrewe/refactor

Quite some refactoring of the front facing objects

Very nice, thanks