Add JRC2018 templates of different resolution

[shuocao818]

Hello,

Current available JRC2018U template has a resolution of 0.38x0.38x0.38um that have 456 stacks. It would be nice to have a template at the resolution of 0.519x0.519x1um that have 174 stacks (https://www.dropbox.com/s/cjcslfa2daxptu8/JRC2018_UNISEX_20x_HR.nrrd?dl=0) so that .nrrd neuron objects can be generated for driver line searching in MCFO Color depth MIP dataset.

Thanks!

[jefferis]

In the meantime, something like this should work:

JRC2018Umip=templatebrain("JRC2018Umip", dims = c(1210,566,174),
  voxdims = c(0.519,0.519,1), units = "microns")