Expand documentation for BitmapFont.
Fix typos in the documentation
Fix erroneous Javadoc tags.
Adds MinMaxViewport and DoubleRatioViewport
Minor cleanup.
Gets rid of DoubleRatioViewport and adds a snap flag to MinMaxViewport instead
Remove obsolete function checkGLES1Validity from VertexAttributes.
Merge pull request #1506 from lioncash/documentation

Expand documentation some more
Merge branch 'origin/master'

Conflicts:
	gdx/src/com/badlogic/gdx/utils/viewport/DoubleRatioViewport.java
	gdx/src/com/badlogic/gdx/utils/viewport/MinMaxViewport.java
	gdx/src/com/badlogic/gdx/utils/viewport/MinMaxViewportBase.java
Minor cleanup.
Changed tests to not use Viewport#toString.

Was weird.
Fixes scaling bug in MinMaxViewport
Merge branch 'master' of github.com:libgdx/libgdx
Merge pull request #1520 from lioncash/gles

Remove obsolete method checkGLES1Validity from VertexAttributes.