Merge pull request #84 from skaldarnar/develop

Bug fixes for #64 and #76
Merge pull request #85 from skaldarnar/develop

Button border bug fix - fixes #72
Merge pull request #86 from skaldarnar/develop

Fixing self update again - closing #76
Fix call of "getOs()" and format code/files
Merge pull request #88 from mkalb/littleFixes

Fix call of "getOs()" and format code/files
Merge branch 'develop' of github.com:MovingBlocks/TerasologyLauncher into develop
Added Gaussian blur filter to ImageUtils and blur the background image.
+ small changes to Settings dialog, may fix "windowClosed is called twice"