English grammar fixes to index.html (#8)

Various grammatical errors in the English text of index.html have been fixed, to be correct English grammar.

index.html

@@ -63,9 +63,9 @@ <h2>
           Solar2D is a Lua based game engine with focus on ease of iterations and usage<br/>
         </h2>
         <p class="description">
-          This is a fully open source project that is forked of the well established and widely
+          This is a fully open source project that is forked from the well established and widely
           used Corona SDK game engine, which is no longer commercially supported.
-          Development is lead by Vlad Shcherban, former technical lead engineer at Corona Labs Inc.
+          Development is led by Vlad Shcherban, former technical lead engineer at Corona Labs Inc.
           If you are using this engine, consider <a href="#support">supporting</a> its development.
         </p>
       </div>
@@ -86,7 +86,7 @@ <h3>Build Fast</h3>
         <div class="point">
           <p class="icon-plugin"></p>
           <h3>Plugins for all needs</h3>
-          <p>Select from numerous plugins which extend the Solar2D core for features like in-app advertising, analytics, media, and much more. A vast variety of plugins is available via <a href="https://plugins.solar2d.com">Solar2D free directory</a> or third party stores, like <a href="http://solar2dmarketplace.com">Solar2D Marketplace</a> and <a href="https://www.solar2dplugins.com">Solar2D Plugins</a>.</p>
+          <p>Select from numerous plugins which extend the Solar2D core for features like in-app advertising, analytics, media, and much more. A vast variety of plugins are available via the <a href="https://plugins.solar2d.com">Solar2D free directory</a> or third party stores, like <a href="http://solar2dmarketplace.com">Solar2D Marketplace</a> and <a href="https://www.solar2dplugins.com">Solar2D Plugins</a>.</p>
         </div>
         <div class="point">
           <p class="icon-native"></p>
@@ -96,7 +96,7 @@ <h3>Call any native library</h3>
         <div class="point">
           <p class="icon-production"></p>
           <h3>Production ready</h3>
-          <p>Solar2D is official fork of Corona SDK, which has been in active development for over 10 years, and used by hundreds of thousands of apps and developers.</p>
+          <p>Solar2D is the official fork of Corona SDK, which has been in active development for over 10 years, and has been used by hundreds of thousands of apps and developers.</p>
         </div>
         <div class="point">
           <p class="icon-lua"></p>
@@ -123,7 +123,7 @@ <h3>Community</h3>
         <div class="point">
           <p class="icon-opensource"></p>
           <h3>Open Source</h3>
-          <p>All source code and resources are available under <a href="https://opensource.org/licenses/MIT" target="_blank">MIT license</a>.</p>
+          <p>All source code and resources are available under the <a href="https://opensource.org/licenses/MIT" target="_blank">MIT license</a>.</p>
         </div>
       </div>
     </div>