update documentation

update docs to describe the new config options that are "built in" to control routing, etc within quiver construction. These fall under the [data discovery] sections of the config files and include

• stride
• window
• do_not_window

also add a description of the new objects, logic, for I/O

• UmbrellaClassifierData

add description of control over segment queries via options in [data discovery] section and [segments] section

• ignore_segdb