Implemented batch geocoding, made the AddressInput's values Options, and renamed Components to AddressComponents

[Cosiamo]

I wasn't able to add the "Fields" value in geocode batch because the documentation for batch geocoding don't explain how to pass it to the API. However, this can be easily implemented in a future update, if Geocodio updates their API docs. I had to add a new struct for batching because the returning json format is different.

Single Geocoding

{
  "input": {
    "address_components": {
     ...

Batch Geocoding

{
  "results": [
    {
      "query": "1109 N Highland St, Arlington VA",
      "response": {
        "input": {
          "address_components": {
           ...

The reason I made AddressInput's values Options is because if someone created an address parser to fill out a vector of AddressInput structs and one or two of the addresses' had weird formatting which didn't return a country or ZIP, it wouldn't return an error, instead just return a low accuracy score for those addresses.