updated readme with breakpoint explanation

README.md

@@ -8,6 +8,7 @@ PriorityNav is a lightweight pure javascript plugin that will move your menu ite
 
 ### Features
 - **No dependencies**<br>The plugin is written in pure javascript making it fast and lean.
+- **Breakpoint**<br>When the breakpoint has been reached the plugin will automaticly move all items to the dropdown & change the toggle label to navDropdownBreakpointLabel.
 - **Smart calculation of available space**<br>It automatically looks for the main navigation's siblings and calculates remaining space.
 - **Flexible**<br>Because of the point above you can have multiple inline-block/flexbox items on the same level.
 - **Non obstructive menu dropdown**<br>The dropdown menu can be closed by clicking outside and pressing escape.
@@ -45,15 +46,17 @@ Ideal html structure
 
 ### Options
 ```js
-initClass:          "js-priorityNav", // Class that will be printed on html element to allow conditional css styling.
-mainNavWrapper:     "nav", // mainnav wrapper selector (must be direct parent from mainNav)
-mainNav:            "ul", // mainnav selector. (must be inline-block)
-navDropdown:        ".nav__dropdown", // class used for the dropdown.
-navDropdownToggle:  ".nav__dropdown-toggle", // class used for the dropdown toggle.
-navDropdownLabel:   "more", // Text that is used for the dropdown toggle.
-throttleDelay:      50, // this will throttle the calculating logic on resize because i'm a responsible dev.
-offsetPixels:       0, // increase to decrease the time it takes to move an item.
-count:              true, // prints the amount of items are moved to the attribute data-count.
+initClass:                  "js-priorityNav", // Class that will be printed on html element to allow conditional css styling.
+mainNavWrapper:             "nav", // mainnav wrapper selector (must be direct parent from mainNav)
+mainNav:                    "ul", // mainnav selector. (must be inline-block)
+navDropdown:                ".nav__dropdown", // class used for the dropdown.
+navDropdownToggle:          ".nav__dropdown-toggle", // class used for the dropdown toggle.
+navDropdownLabel:           "more", // Text that is used for the dropdown toggle.
+navDropdownBreakpointLabel: "menu", //button label for navDropdownToggle when the breakPoint is reached.
+breakPoint:                 500, //amount of pixels when all menu items should be moved to dropdown to simulate a mobile menu
+throttleDelay:              50, // this will throttle the calculating logic on resize because i'm a responsible dev.
+offsetPixels:               0, // increase to decrease the time it takes to move an item.
+count:                      true, // prints the amount of items are moved to the attribute data-count to style with css counter.
 
 //Callbacks
 moved: function () {}, // executed when item is moved to dropdown