Update SkyWatcher.cs

I've added magnitude to all stars, therefore closing #88.
Update MainForm.cs

Took advantage of commit afe7b29c6cf3662b489f6506ab1589403478e5f0, therefore closing #88.
Update SkyWatcher.cs

Added the constellation of Delphinus, therefore closing #8.
Merge pull request #4 from luis140219/master

Fix number 6 to lovemark/skywatcher