Grammar fixes (#66)

Swapped out "it's" for "its" where appropriate.

docs/index.html

@@ -912,7 +912,7 @@ <h2>Settings</h2>
             <span class="setting-name">rewind</span><br>
             <span class="type">Type:</span> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Boolean">Boolean</a><br>
             <span class="type default">Default:</span> false<br>
-            If true, Glider.js will scroll to the beginning/end when it's respective endpoint is reached
+            If true, Glider.js will scroll to the beginning/end when its respective endpoint is reached
           </li>
           <li>
             <span class="setting-name">scrollPropagate</span><br>
@@ -949,7 +949,7 @@ <h2>Settings</h2>
             <span class="setting-name">skipTrack</span><br>
             <span class="type">Type:</span> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Boolean">Boolean</a><br>
             <span class="type default">Default:</span> false<br>
-            Whether or not Glider.js should skip wrapping it's children with a 'glider-track' &lt;div&gt;.
+            Whether or not Glider.js should skip wrapping its children with a 'glider-track' &lt;div&gt;.
             <span class="aside">NOTE: If true, Glider.js will assume that the 'glider-track' element has been added manually. All slides must be children of the track element.</span>
           </li>
 
@@ -970,7 +970,7 @@ <h2>Events</h2>
           </li>
           <li>
             <span class="setting-name">glider-refresh</span><br>
-            Called whenever Glider.js refreshes it's elements or settings<br>
+            Called whenever Glider.js refreshes its elements or settings<br>
           </li>
           <li>
             <span class="setting-name">glider-animated</span><br>
@@ -1000,7 +1000,7 @@ <h2>Events</h2>
         <p class="little-margin"><b>Event Example - Lazy Loading Images</b></p>
           <p>
             A reference to the Glider.js object can be retrieved by re-calling Glider.js with the glider elements
-            as it's sole argument: <code class="slim">var glider = Glider(document.querySelector('.glider'));</code>. Any custom
+            as its sole argument: <code class="slim">var glider = Glider(document.querySelector('.glider'));</code>. Any custom
             event data is passed via the event, located at <code class="slim">event.detail</code>
           </p>
 
@@ -1163,9 +1163,9 @@ <h2>FAQ</h2>
             </p>
             <p class="answer">
               Glider.js aims to be lightweight and fast. There are some planned upgrades to the list such as adaptive height, but they are not present in version 1.0.
-              If there is a demand for other features that can be implemented with little overhead, Glider.js will be happy to include them on it's next release.
+              If there is a demand for other features that can be implemented with little overhead, Glider.js will be happy to include them on its next release.
 
-              <span class="aside">* Infinite looping will never be supported as it's incompatible with native browser scrolling.</span>
+              <span class="aside">* Infinite looping will never be supported as its incompatible with native browser scrolling.</span>
             </p>
           </li>
           <li>
@@ -1206,7 +1206,7 @@ <h2>FAQ</h2>
               How is Glider.js different from other carousels?
             </p>
             <p class="answer">
-              Aside from the fact that Glider.js is "not a carousel", it's main benefits are it's size, speed and native scrolling design. Due to this,
+              Aside from the fact that Glider.js is "not a carousel", its main benefits are its size, speed and native scrolling design. Due to this,
               touch devices benefit from momentum based scrolling while still allowing other default scrolling methods (touch, touchpads, hoz. mousewheel, arrow keys, scrollbars, etc), all within in a tiny
               footprint and buttery-smooth performance!