Add link to the API documentation

Author: infeo

index.html

@@ -31,6 +31,7 @@
                            <ul class="dropdown-menu" role="menu">
                               <li><a href="https://github.com/dokan-dev/dokany/blob/master/README.md">Getting Started</a></li>
                               <li><a href="https://github.com/dokan-dev/dokany/wiki">Wiki</a></li>
+                              <li><a href="https://dokan-dev.github.io/dokany-doc/html">API Documentation</a></li>
                               <li class="divider"></li>
                               <li class="dropdown-header">Discussion</li>
                               <li><a href="https://github.com/dokan-dev/dokany/issues">Issues</a></li>