##Features
- ofxGuiGroupExtended, ofxPanelExtended:
- horizontal alignment
- header can be hidden
- option to allow only one active toggle (only working with ofxMinimalToggle at the moment)
- ofxMinimalToggle, ofxMinimalButton: toggles and buttons with name inside
- ofxRotarySlider: rotary slider
- ofxGuiSpacer: spacing element
- ofxGuiMatrix: matrix of gui elements, column count and element height adjustable
- ofxCanvas: shows texture reference
- ofxZoomableCanvas: texture can be zoomed with scroll wheel and dragged with mouse button when in zoom
- ofxValuePlotter: plots a value and displays the current value. option to set decimal place and value name
- ofxFpsPlotter: plots FPS
see example for usage. running only with the current github OF version (0.9.0) on linux64bit and possibly also on other systems. needs testing.