Log Message:
Import csp2b-1.2 as wip/csp2b.

The csp2B tool provides a means of combining CSP-like descriptions
with standard B specifications. The notation of CSP provides a convenient
way of describing the order in which the operations of a B machine may occur.
The function of the tool is to convert CSP-like specifications into standard
machine-readable B specifications which means that they may be animated
and appropriate proof obligations may be generated. Use of csp2B means that
abstract specifications and refinements may be specified purely using CSP
or using a combination of CSP and B