First tests added
Merge remote-tracking branch 'origin/master' into add_test_project

Conflicts:
	src/StefanOssendorf.BulkMailing/Properties/AssemblyInfo.cs
	src/StefanOssendorf.BulkMailing/packages.config
added smtpclientwrapper tests
tests added and refactored
added MailSenderSpecs
refactored MailSender