stop database blowing up when it expects a non-existent field in FormStage... wise?

Conflicts:

	R/stages.R
allow formstages to return NEXT/WAIT

Conflicts:

	R/pages.R
seats fix

Conflicts:

	R/betr.R
workaround Rook 1.1.1 bug in params()

Conflicts:

	R/betr.R
	R/servers.R
Rook workaround version-specific
really make Rook workaround work
next_stage default is 1:N
fix untrace_stage (merge)
hits info for subjects table
is_one_of function
v0.2 document() rerun