Allow running all transforms for a state

I think I introduced this as a regression when I refactored the
way validations were selected and run.
Validate contest, candidate and result counts for MD 2006 primary

Addresses https://github.com/openelections/core/issues/36
Strip leading/trailing whitespace from legislative headers

Results for the 01A House of Delegates district were getting
skipped because the column in the 2006 primary state legislative
results CSV has a leading whitespace, i.e. " LEGS 01A".