ReadMe: Point to the generated API documentation.
Curl: More precise error check (check for false instead of just falsy).

For example, the string "0" evaluates to false.
ReadMe: Whoops, GitHub Pages is not SSL.
examples/download-file: Check return value for "file not found".
examples: New create-shareable-link example.
Path.getErrorNonRoot: New helper that doesn't accept "/" as a valid path.

Also updated examples to use it.
Path: Forgot to include this in 8dfb828d801dbef23ab97d7d43e09d9cc580c547
Client.getThumbnail(): Better docs for return value.
secureStringEquals: Ensure both parameters are strings.

Apparently strcmp will accept arrays and then do weird things.

http://danuxx.blogspot.com/2013/03/unauthorized-access-bypassing-php-strcmp.html
examples/web-file-browser: Don't use STDERR; it only exists for CLI programs.
examples/get-metadata: New example.
Check for spaces in URL before passing it to cURL.

Mysterious things can happen if a URL isn't properly escaped, so add
a defensive check at the lowest level.
Token: Minor doc fix.
Client: Make date format private.
Add ChangeLog.txt
ReadMe: Tell users to put "1.0.x" in Composer version spec.
ChangeLog: Make version match Composer exactly "1.0" vs "1.0.0".
ReadMe: Recommend specifying "1.0.*" instead of "1.0.0".  Update doc link.