Selective load_ccf_annotation

[CBroz1]

• The function load_ccf_annotation currently takes a long time to load (> 20 min). For a given project, much of this is unnecessary data. We load information about the whole brain, when researchers will likely only need a subset. Current function here.
• This function would benefit from optional parameters for minimum and maximum values of X, Y, and Z to load from the provided file and some consideration of how to optimize this loader function.
• If the the element later tried to add a downstream value that did not exist in the upstream atlas, we could trigger the selective loader within a buffer of the new data point