Removed binary files
Added MahApps.Metro + Files -> Exit

*Added the grafical package MahApps.Metro to get a more consistent and
clean look.
*Added Exit under files, working.
Centered tree position

The tree was a bit of center so moved it a bit to the right.
Changed builds from extender to flyout

Changed from extender to flyout for the builds list. More space for tree
and looks and feels better.
Fixed problem with left background in zoom mode
Merge pull request #9 from SpaceOgre/MenuAndGui

Menu and gui