find metrics without expanding all wildcards

[shawnlauzon]

The current graphite.find() function expands all wildcards by passing "format=completer" to the metrics/find command. However, sometimes this is not desired; for example, if the resulting metrics are to be passed to a function (e.g. sumSeries), some of the wildcards should remain.

Proposal is to add a function graphite.findSome(), which accepts wildcards but only expands the final one (i.e. it doesn't pass "format=completer" to graphite.

[shawnlauzon]

Replace with issue #28