Added blank initial option as default to stateSelect
Added safety nets in case entries arent valid

- Check to see if all entries in form search when submitted inputs arent
empty, if they are just return
- if user enters only city and state perform query to find just those
- if user enters only state, find all results from that state alone
- if user enters zip, find all entries with that zip, this is the most
likely to happen
- if user enters only city, search for city 'like' what user entered
Updated route for searchVenue to Get instead of Post

This is so the search shows up in the url and is easier for users to
reference their search