Map Editor Beautification, fixes #2825

I experimented a bit with Visual Studio and WinForms to start a series of usability improvements becaues @xanax said in  #2805 it is not very accessible for beginners. This addresses #2825 specifically which requested a toolbar. Here you go:

![editor-toolbar-small](https://f.cloud.github.com/assets/756669/300664/da7c8c7a-95a0-11e2-9017-7e624e0cc769.png)

But I did not stop there. As you can see the full mod name and version is now displayed in the title bar (instead of just the ID) and every button has a descriptive tooltip for in-line help on mouse-over. Some functions are not obvious. Plus everyone likes Icons so I added them everywhere.

![active-mod-icon](https://f.cloud.github.com/assets/756669/300672/02bc7d76-95a1-11e2-83c5-d03ad6e11d3c.png)
![map-menu-icons](https://f.cloud.github.com/assets/756669/300671/fe0d6f2e-95a0-11e2-8906-2242cacf7670.png)
![xy](https://f.cloud.github.com/assets/756669/300673/04a058c4-95a1-11e2-9ba0-e2c98a1b41e0.png)

As I revamped the wiki one by one in the last months and because only few people might know about the awesome http://content.open-ra.org website I added a collection of useful links in the help menu:

![help-menu-icons](https://f.cloud.github.com/assets/756669/300685/57aa0cb8-95a1-11e2-8dcb-4f4aaad25caf.png)

This should get you started. :)