Better approach to resolving relative file paths

Replaced strange approach to resolving relative folder  / file paths
with an approach that can consistently get the application root path
using the AppDomain. This avoids problems when the HttpContext is not
available.

Better approach to resolving relative file paths

Application was using a strange workaround to avoid problems when the
HttpContext was not available for resolving relative file paths.
Replaced this with a more consistent approach using the current app
domain.
Replaced custom logging code with NLog

Removed unused log4net reference.
Replaced custom logging code with NLog
Moved Lucene.NET related code to code-behind file

Moved Lucene.NET related code to code-behind file
Replaced Lucene.NET with ElasticSearch / NEST
Moved email related code to a separate folder

Renamed some classes and moved the code in preparation for a big
refactoring of all email related code.
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
Replaced custom error email logging with MailTargent in NLog
adding my database connection string
Unifying jquery on version 1.11.1
Adding files from version 1.11.1 of jQuery UI
Fixing paths to jquery UI images
Referenceing new jQuery UI
Updating jquery mobile to the latest.
Removing text area resize in favour of the resizable behaviour from jQuery UI
Removing old version os jquery ui and mobile