Merge pull request #691 from SeiferTim/dev

Update FlxTypedGroup.hx
Fixing issue with incorrect property declaration for FlxGamepad.axis.
Merge pull request #693 from SeiferTim/dev

Added inWorldbounds function
Fixed issue with gamepad access.
Made default font be non-inline, so it can be modified.
Reverting back changes to MultiVarTween, it caused bugs while tweening floats. We must find another way to fix the color tweening issue.
Added distanceWithin()
Added IncludeEqual param to distanceWithin()
Added other distanceWithin functions
Added prefix "is" to the distanceWithin functions

to more clearly indicate a Bool return
Add the addons package to the api doc generator
Merge pull request #695 from kevinresol/master

Added distanceWithin() functions to FlxMath
Revert back changes in VarTween, it caused bugs while tweening floats
Fullscreen for cpp
Merge branch 'dev' of https://github.com/HaxeFlixel/flixel into dev

# By sergey-miryanov
# Via sergey-miryanov
* 'dev' of https://github.com/HaxeFlixel/flixel:
  Revert back changes in VarTween, it caused bugs while tweening floats
Merge commit '716b5dcb7b58bc0d86b986578b2e3cc957403934'
Cleaning up licensing files.
Removing lower cased license.txt file (changing caps in git is a pin in the butt).
Update README.md

Updating upgrade docs instructions.
Updated haxelib.json