CodeSnip Old Code (SVN)

* Renamed TOrderedDictionary and TSortedDictionary and TOrderedList as TSortedList.
* Updated unit tests to use renamed classes.

Commented the unit's classes.

* Added Items and ItemsByIndex properties to TOrderedDictionary.
* Re-implemented Keys and Values properties of TOrderedDictionary as enumerable collections and removed ValuesByIndex property.
* Added internal, public TKeyCollection, TKeyEnumerator, TValueCollection and TValueEnumerator classes to TOrderedDictionary.
* Updated TestUOrderedDictionary unit re changes and additions to TOrderedDictionary.
* Removed commented out code and implemented TODOs

Changed TOrderedDictionary and TOrderedList to descend from TEnumerable<T>.

Added public convenience TPairEnumerator type to TOrderedDictionary for type of enumerator that enumerates all key=value pairs in dictionary.

* Added change notification events to TOrderedDictionary and TOrderedList.
* Added tests for these new events to unit tests.

* Copied TOrderedDictionary from UOrderedDictionary.pas to UContainers.pas.
* Deleted UOrderedDictionary.pas and removed from unit test project.
* Modified source files that referenced UOrderedDictionary.pas as required.

* Moved UOrderedList.pas from Src/Experimental directory into Src directory and renamed as UContainers.pas. This renamed unit will receive other container classes.
* Updated various source files re change of unit name.
* Added UContainers.pas to the main CodeSnip project.

Merged trunk changes 796-799 and 801-826 into the new-backend branch.

Merged trunk changes 796-799 and 801-826 into the revised-webservices branch