Feature Request: Space Management

[deefactorial]

Add Space feature to create trading name
Spaces default to cc space.
cc space designation is explicit.
space public or private option with cc default public and non-cc default private.
creation of trading name is subject to conditions of the space it is within.
creation of trading name is subject to currency conditions.

[deefactorial]

Currency restriction space option during the creation of the currency

[mwlinton]

registration option - low is .cc
otherwise select "real" space from a pulldown list? or access to space(s) through independent page(s)? -