More metadata goodness!

[John Wiegley]

Just added a new feature to better improve 3.0's use of metadata:

There are now "tag/pop" directives, to apply metadata to a range of
transactions (and their postings). For example, if you wanted a
conceptual "page" of transactions relating to business trip to
Chicago, you could do this:

tag Location: Chicago
tag Purpose: Business

... transactions go here

pop
pop

It would be as if you'd applied "; Location: Chicago", etc., to every
transaction.

John