Upgrade to VisualStudio 2015

[DinisCruz]

So that it runs on VS 2015

The VisualStudio Galery Page is https://visualstudiogallery.msdn.microsoft.com/295fa0f6-37d1-49a3-b51d-ea4741905dc2

[DinisCruz]

This should be working now, here are the steps to install it

1. In VS 2015 open the 'Extensions and Updates...' menu

2. go into the 'Online' section and search for REPL

3. find the 'VisualStudio C# REPL - O2 Platform' and click download

4. Accept the Apache license

5. Restart VS

6. If all went well, a REPL menu should exist

7. For now, I set it up so that the O2 Log Viewer is opened (but minimised)

8. To try it out, use this menu option

9. which should change the title, add couple info/error messages and open a couple files