Fixed broken links in index.rst
is_null test does not work for default 'false'

If no parameter is given for $delayWhileIdle it defaults to false. the is_null check for the parameter results into false and a delayWhileIdle payload is set to false resulting in an 400.
Merge branch 'patch-1' of github.com:row-b/php-library2 into CE-45-Null-False-Fix

- Merged in changes, tagged new release