Included email polling projects in main solution
Deleted experimental Pop3 polling code from BugTracker.Web

This is generally not a very good approach and won't work consistently
with a lot of host providers (eg. GoDaddy or Azure).
Added OpenPop.NET reference to email polling projects
Replaced Pop3 implementation with OpenPop.NET
Replaced SharpMimeTools with OpenPop.NET in BugTracker.Web
Removing SharpMimeTools source code

Not using this package anymore so we don't need to keep the code hanging
around