Use formatters for :cacti_style

[criemen]

Hey, when using
:cacti_style => true
on a field with huge values (10GB in bytes), the number is not formatted with an unit.
It would be nice to have the number formatted with respect to the yunit_system property.

[keymon]

I think this bug report should be in ripienaar/graphite-graph-dsl repo. Even thought, I think it is a problem in graphite itself.

[davewongillies]

This is definitely a problem with graphite-web and not gdash or graphite-graph-dsl. There's been a commit to fix this, but its not in 0.9.10 yet