#5 Add possibility to select single experiments in Cell View

[Johannes Griss]

Add the possibility to select the displayed experiments making up a cell type.
User interface could be similar to selecting displayed classifications.
Technical solution could include the following:
send a list of all experiments making up the cell (id as well as accession - display accession if possible),
add a field to every protein containing all experiment accessions in which the protein was identified as a string ([id], [id] ...),
add a field to every protein containing the number of peptides identified in every experiment