Merge pull request #180 from mkaring/1.4

Fixing more bugs
replaced Integer.compare(int x, int y) with Java 1.6 compatible version
removed unnecessary nifty.createImage() call from AllExamplesMain
Merge pull request #181 from mkaring/1.4

Fixed tab group error
.apt_generated added to .gitignore
Update LWJGL to version 2.9.1
Merge pull request #182 from mkaring/1.4

Fixed text field focus problem
fix too early closing of InputStream
Merge pull request #183 from mkaring/1.4

Fixing the console
Merge branch '1.4' of https://github.com/void256/nifty-gui into 1.4