Add derivative calculations to CatmullRomSpline

I added the calculation of the derivative of the spline. This finds the tangent of the curve at the desired point.
Added Function getRemoteAddress() for Socket so it´s possible to implement reconnection logic or peer to peer networking
Manage textures created by FreeTypeFontGenerator

Fixes #870, hopefully.
addAll methods.
Don't allow 0 max check count.
Exception for exceeding image limit.
Merge pull request #896 from MobiDevelop/issue-870

Manage textures created by FreeTypeFontGenerator
Add Matrix4#setTranslation(float, float, float)
Frustum: add methods using floats instead of Vector3
Stringbuilder: add minimum length for int/long
Made libgdx version configurable in gdx-setup
Merge pull request #943 from volley-se/master

OpenAL: Close InputStream when loading Sound
Only move window within title bounds.

Modal windows capture all touchd owns.
Clean up stream handling
Merge pull request #948 from hneuer/streams

Clean up stream handling
Javadoc

closes #949
Merge branch 'origin/master'
Added Immersive Mode option
Set skin on dialog table.
Added Android 4.4 Kitkat Immersive Support