Ingore *.vsps files.
Move user interface related classes to the separate namespace.
Remove window header.
Create main menu.
Add `Help->Website` to menu.
Merge commit '6bb028ff2d3c11b1540d0201b1ce0d706a592b99' into header-to-menu

Conflicts:
	LoadBench/Ui/MainForm.cs
Remove menu background gradient.
Merge branch 'header-to-menu' into complex-stats
Rename `StatCollector` to `StatEventCollection`.
Update projects.
Change StatEventCollection owner reference to the owner's id.