Windows UI doesn't start anymore if service not running or not available

Until now the Windows UI threw an exception and  closed without any messagebox/warning. Now the error gets catched safely and a messagebox gets displayed. Furthermore the hint in the mainwindow now also gets displayed again if the connection gets losed while running the UI.

Signed-off-by: chrishensel <futurefwarrior@googlemail.com>
Re-added check for database connection on service startup

The service won't begin with starting if no connection to the configured database server is available, since that is crucial for the services to function.
Code cleanup and tidying

Some AssemblyInfo.cs files were not correct, some projects missed information in there, and sometimes the information was incoherent. Also some .csproj-files had maliciously formatted references, which could occassionally lead to compilation or resolving issues.
Corrected release build file
Updated for v0.9.5 release
Added release notes for next version
Merge branch 'master' into next