Add phpinfo file

fix getenv to all lower-case case.
Do proper credential configuration for cloudcontrol

Don't try to get settings from environemnt variables, access creds.js
instead.
Fix bug when loading feed, better error handling

Use DOMDocument::loadXML(string) instad of
DOMDocument::load(file).

Handle unsuccessful HTTP requests for feed.
Handle unsuccessful DOM parsing.
Better error handling in PinboardClient

Cache URL existence by pinboard user ID.
Fix bug when setting authToken in index.php.
Log HTTP and XML parsing errors in PinboardClient.
Throw excpetion if PinboardClient encounters too many HTTP errors.
Use curl for HTTP client requests
Add README