Clarify status of regions (all kinds) regarding connected or not

[zhengj2007]

From [email protected] on January 29, 2013 12:05:19

We removed the distinction between connected and not that was present in BFO 1. Clarify what the upper level terms mean in the documentation and in editor notes.

Original issue: http://code.google.com/p/bfo/issues/detail?id=141