Implement web based random picker and prompt people for credentials
and event ID.
Leave original cli program alone.
Also leave composer.json alone.
Several changes to API key storage.

Renamed index.html to index.php
Added config.php to store API key outside public_html folder.
Added ajax.php to to fetch RSVPs using config.php.
Modified pickme-cli.php to use config.php for API key.
Modified installation instructions in README.md
Merging my changes with Spencers Changes
Fixed sample config file.
$config variable in config file needs a semicolon.
Make correction to README.md

Under web front end section, delete redundant line to clone repo.
Merge pull request #2 from piontkowski/master

Create web front end, prompt for event ID and API