In flask_server, update command parser to support downloading reconstructions
In io, add new way of zipping all output into a single zip file for downloading from analytical server
In cdi webapp, do better type checking and use css to display if input type is correct
In imaging backend, add new method for saving reconstructions for download
In xpcs interface, check for recalculate on region add
In fth interface, check types prior to propagation
In xpcs_backend, remove some debugging prints that cluttered up the terminal
Added readme for using analysis server