Expression pattern remodel

This is a proposal for changing the current ?Expr_pattern model in order to capture

• quantitative expression
• life_stage, cellular_compartment expression specificity

we will also take the opportunity to clean up some unused tags

‪ CDS: no objects‬ ‪ Sequence: 8 objects I could consolidate with other classes -e.g. clone‬ ‪ Pseudogene: no objects ‬ ‪ Protein: 1 object found by Paul d, should figure out from where it comes‬ from ‪ Cell: no objects ‬ ‪ Cell_group: no objects‬