Split NMR Targeted from LC-QqQ Targeted objects

[Gscorreia89]

The features for import and QC of both targeted NMR (Bruker ivdr methods) and LC-QqQ MS assays are using the same general TargetedDataset. However, NMR Targeted methods are conceptually very simple, while LC-QqQ require a set of specific extra attributes. Maintaining both features in a single object is making modification of targeted QC features much harder to debug and improve, so these should be split to different specific TargetedDataset objects (which might or not inherit from an abstract Targeted Dataset object).