Added Error Window + Added Bad Password Detection

ListServerConnection class now properly detects and acts against invalid
passwords to notify user through newly configured ErrorWindow.cs. TO-DO:
Clean up ErrorWindow.cs. Also added .gitignore to ignore builds and
such.
Update ErrorWindow.Designer.cs
More Error Window updates
Merge branch 'master' of https://github.com/dmcall774/OpenGraal.RemoteControl-cs
Merge pull request #2 from dmcall774/master

 Added Error Window + Added Bad Password Detection