xFunc 2.15

Added Unit Converter.

xFunc 2.13.3

Added +=, -=, *=, /=.

xFunc 2.13.2

Added increment (++) and decrement (--).

xFunc 2.13

Added #66.

xFunc 2.12.1

Added "ceil" and "floor" functions.

xFunc 2.12.0

Added the "round" function.

xFunc 2.10

Added "sum" and "product" functions.

xFunc 2.9

Added settings.
Added an ability to add/edit/remove variables and functions in UI.

xFunc 2.8.5

Changed MathParameterCollection and VariableView.

xFunc 2.8.3

Fixed #57.