Tissue metadata

[dangeles]

Current options for tissue are:

Whole-worm (multi-worm)
Whole-worm (single-worm)
Other

Maybe we should expand other to:
single cell
single cell type/Tissue

For cell type/Tissue, we could provide the largest 10 tissues in C. elegans. Raymond can provide advice on this. If no easy fix, then disregard.

For single purified cells, we should probably offer a dropdown menu of all the neurons, all the early embryonic cells (up to the 8 cell stage), and the distal tip cells/linker cell.