Remove note about PHP 5.2 support (#1678)
Remove note about PHP 5.2 support (#1678)

* Remove note about PHP 5.2 support

* Add v2 and v1 note

eRadical/google-api-php-client,michabbb-backup/google-api-php-client,bshaffer/google-api-php-client,michabbb-backup/google-api-php-client,googleapis/google-api-php-client