pass username to installers

fixes #530
Added a test handler #1395

quick and dirty for first iteration (spike)
Merge pull request #1533 from Particular/incorrectUserName

pass username to installers
remove notifications

moved to https://github.com/Particular/NServiceBus.Notifications
update costura to improve build time
refactored #1395

quick and dirty for first iteration (spike)
remove notification sample
remove v1 projects from build script
Moved unit tests to NServiceBus.Core.Tests
Making sure we include message types in list of types
Merge remote-tracking branch 'origin/develop' into assemblyscanner
Ensuring message types are included.

Removed hard coded assembly exclusions.
Filtering out compile generated classes