OF-1194: Allow for bulk data transfer.

This commit improves the SMS service for speed / data transfer. Instead
of establishing a new connection to the SMSC for each message, such
connections can be pooled and re-used.

build/lib/versions.txt

@@ -10,6 +10,7 @@ cglib.jar                           | 2.1.3 (JMock 2.1.0)
 commons-lang.jar                    | 2.3                                                          | Apache 2.0
 commons-httpclient.jar              | 3.1                                                          | Apache 2.0
 commons-codec.jar                   | 1.9                                                          | Apache 2.0
+commons-pool2.jar                   | 2.4.2                                                        | Apache 2.0
 dom4j.jar                           | 1.6.1                                                        | BSD (http://www.dom4j.org/dom4j-1.6.1/license.html)
 concurrentlinkedhashmap-lru         | concurrentlinkedhashmap-lru-1.0_jdk5                         | Apache 2.0
 dbutil.jar                          | Jive Code, no release version.                               | GPL