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 where it comes from
• Cell: no objects
• Cell_group: no objects