ofxGuiExtended ALPHA

##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.