Added unit tests for basic calculations of min-max values and dynamic range
Added percentage of space between bars as a property
Added basic calculations (min value, max value, dynamic range) needed to generate graphs
Added constants for default colors in bar chart class
Added color properties to bar chart class
Added class extension for Core Graphics abstraction layer
Added default initialization for bar chart colors
Added background drawing to bar chart
Added view and example values to render bar chart
Added CG library to tests target
Added test case for value normalization function
Added function to normalize values against a given max value
Finished implementation of method used to generate bar charts in color
Added colors and color-space to the CoreGraphics layer of the bar chart class
Removed additional space following the last bar in the chart
Added colors and values to the example