Set address in data so it has a value (#70)
Set address in data so it has a value (#70)

Closes #69.  `ParcelHome.address` was value-less until the user typed into the search.  This adds an initial state as an empty string to avoid the runtime error reported in the bug.
code-for-nashville/parcel,code-for-nashville/parcel,code-for-nashville/parcel