Updated CHANGELOG

Author: SLsthompson

CHANGELOG.textile

@@ -1,13 +1,14 @@
 *3.0*
-* Added a method to reboot servers.
-* Substantially rewrote the ObjectFilter class.  ObjectFilters used to be hashes which made it easy to manipulate their content incorrectly. The new implementation has a strict interface that makes it harder to manipulate filters incorrectly.
+* Substantially rewrote the ObjectFilter class. ObjectFilters used to be hashes which made it easy to manipulate their content incorrectly. The new implementation has a strict interface that makes it harder to manipulate filters incorrectly.
 * Added a model for Virtual Server Image Templates (SoftLayer::ImageTemplate) - VirtualServerOrder now requires an instance of this class rather than allowing you to provide just the global_id of an image
 * Added a model for data centers (SoftLayer::Datacenter). Bare Metal, Bare Metal Package, and Virtual server orders now use an instance of Datacenter to identify where their servers will be provisioned. The routines in those classes which used to provide lists of valid data center names now return data center objects.
-* The routine to retreive the open tickets on an account has been moved from the Ticket class to a dynamic property of an account
+* Virtual Server Upgrades are now handled by the VirtualServerUpgradeOrder class and not the VirtualServer class. This change was made for several reasons. Firt and foremost, it allows multiple aspects of a virtual server to be upgraded at once without having to wait on separate transactions to complete between upgrades. Secondly it opens the door for additional upgrades (for example, to disk configuration) to be added in the future.
+* Added a method to reboot servers.
+* The routine to retreive the open tickets on an account has been moved from the Ticket class. The set of open tickets is now a dynamic property of an account object.
 
 *2.1.1*
 * Virtual server upgrades no longer raise exceptions
-* Formalized the RDoc documentation process.  Added overview and welcome documentation and changed the README so it directs folks to the new documentation.
+* Formalized the RDoc documentation process. Added overview and welcome documentation and changed the README so it directs folks to the new documentation.
 
 *2.1.0*
 * Began implementing a model framework that allows Ruby developers to work with elements in the SoftLayer API in a more object-oriented fashion. The first release of this framework includes the Ticket, VirtualServer, and BareMetalServer classes.