Set CURLOPT_URL before CURLOPT_CUSTOMREQUEST

One of my users reports this PHP warning:
"Warning: Can't set CURLOPT_CUSTOMREQUEST before CURLOPT_URL in Google/IO/Curl.php
on line 57"

Hence, this tweak.
Updated MapsEngine.php
Updated AdExchangeBuyer.php
Updated Games.php
Merge pull request #168 from chixor/master

Replaced non existing variable $now with mktime().
Updated MapsEngine.php
Updated Analytics.php
Updated IdentityToolkit.php
Merge pull request #162 from DavidAnderson684/patch-3

Set CURLOPT_URL before CURLOPT_CUSTOMREQUEST
Updated Books.php
Updated Calendar.php
Added service Replicapool.php