Release streetnamer 0.1.0

[giocomai]

First release:

• usethis::use_cran_comments()
• Update (aspirational) install instructions in README
• Proofread Title: and Description:
• Check that all exported functions have @return and @examples
• Check that Authors@R: includes a copyright holder (role 'cph')
• Check licensing of included files
• Review https://github.com/DavisVaughan/extrachecks

Substantive issues:

• Interface support multiple languages
• Option to see street names with local alphabet (e.g. for Greece and Bulgaria) or Latin alphabet