OpenPOP.NET Version 1.3a is ready to serve

OpenPOP.NET Version 1.3a is ready to serve:

This new version including the following major improvements:
1. Lots of known bugs fixed;
2. Adding DateTimeInfo/ReceiveContentSleepInterval/WaitForResponseInterval in POPClient class, ReadPlainTextFromFile in MIMEParser.Utility class;
3. Adding descriptions to every public functions/property/void of every class;
4. Heavily refactored POPClient class (by dteviot);
5. Now with 6 events in POPClient class: CommunicationOccured/CommunicationLost/AuthenticationBegan/AuthenticationFinished/MessageTransferBegan/MessageTransferFinished;
6. More constructors in each class;
7. Renamed DeleteMessages to DeleteAllMessages;
8. Added support for the LIST command (by dteviot);
9. Added explicit destroy to members in every class to solve memory problem;
10.Many functions got rewritten;
11.Added copyrights regarding GPL/LPGL;
12.For detail changes, please visit: https://sourceforge.net/projects/hpop/