Merge branch 'master' of https://github.com/libgdx/libgdx into various
Proper support for onAttachedToWindow and onDetachedFromWindow methods on Android 2.x
Added function to add an asset to the AssetManager
Added function to retrieve all the assets of a give type
C-style comments for JsonReader.

closes #1571

```
System.out.println(new JsonReader().parse(" /*x*/ { /*x*/ a: /*x*/ 123 /*x*/ } /*x*/ "));
System.out.println(new JsonReader().parse("/*x*/{/*x*/a:/*x*/123/*x*/}/*x*/"));
System.out.println(new JsonReader().parse(" //x\n { //x\n a: //x\n 123 //x\n } //x\n "));
System.out.println(new JsonReader().parse("//x\n{//x\na://x\n123//x\n}//x\n"));
```
Merge branch 'origin/master'
Added flick feature to scrollpane.
Added fling gesture to scrollpane.
Added fling gesture to Scrollpane.
Update CHANGES
Merge pull request #1574 from karan1213/master

Added new method fling(...) in scrollpane.java
Merge pull request #1573 from karan1213/patch-1

Update CHANGES
Fix constructor to match core

Fixes #1577
Formatting
Add TextureRegion setter for UV range
removed unnecessary android backend classes
fixed issue #1563
Merge pull request #1580 from alex55i/uvrange

Add TextureRegion UV range setter to MeshBuilder.
Merge remote-tracking branch 'upstream/master'
Rename get to getAll AssetManager
Removed function to add an asset to the AssetManager
Update to meet commit e4d6a4e.