update readme formatting

README.md

@@ -19,27 +19,31 @@ or
 * Create the `TTRangeSlider` in code using `[TTRangeSlider alloc] init]` then add it as a subview to your code and set the relevant autolayout properties or frame.
 
 Then, customisation of the control is done using the following properties:
-* `tintColor`
+#### `tintColor`
 The tintColor property (which you can also set in Interface Builder) sets the overall colour of the control, including the colour of the line, the two handles, and the labels.
+
 It is safe to change the `tintColor` at any time, if the control is currently visible the colour change will be animated into the new colour.
-* `minValue`
+#### `minValue`
 The minimum possible value to select in the range
-* `maxValue`
+#### `maxValue`
 The maximum possible value to select in the range
-* `selectedMinimum`
+#### `selectedMinimum`
 The preselected minumum value (note: This should be less than the selectedMaximum)
-* `selectedMaximum`
+#### `selectedMaximum`
 The preselected maximum value (note: This should be greater than the selectedMinimum)
-* `numberFormatterOverride`
+#### `numberFormatterOverride`
 Each handle in the slider has a label above it showing the current selected value. By default, this is displayed as a decimal format.
+
 You can override this default here by supplying your own NSNumberFormatter. For example, you could supply an NSNumberFormatter that has a currency style, or a prefix or suffix.
+
 If this property is nil, the default decimal format will be used. Note: If you want no labels at all, set this value to be `(NSNumberFormatter *)[NSNull null]` (as opposed to nil), to specifically mark that you want no labels
-* `minLabelColour`
+#### `minLabelColour`
 The colour of the minimum value text label. If not set, the default is the tintColor.
-* `maxLabelColour`
+#### `maxLabelColour`
 The colour of the maximum value text label. If not set, the default is the tintColor.
-* `disableRange`
+#### `disableRange`
 If true, the control will mimic a normal slider and have only one handle rather than a range.
+
 In this case, the selectedMinValue will be not functional anymore. Use selectedMaxValue instead to determine the value the user has selected.
 
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