Use https in links and images

Also fixes #27 by changing the URL in the markdown code to the canonical CRAN package URL.

views/index.html

@@ -17,10 +17,9 @@
       <script>
        function update1() {
 	 var pkg = document.getElementById("package").value;
-	 var url = "http://cranlogs.r-pkg.org/badges/" + pkg;
-	 var md = "[![](http://cranlogs.r-pkg.org/badges/" +
-		  pkg + ")](http://cran.rstudio.com/web/packages/" +
-		  pkg + "/index.html)";
+	 var url = "https://cranlogs.r-pkg.org/badges/" + pkg;
+	 var md = "[![](https://cranlogs.r-pkg.org/badges/" +
+		  pkg + ")](https://cran.r-project.org/package=" + pkg + ")";
 	 document.getElementById("url").value = url;
 	 document.getElementById("markdown").value = md;
 	}
@@ -33,7 +32,7 @@ <h1>CRAN download counts</h1>
 
       <p>
 	API for CRAN package download counts, from the
-	<a href="http://cran-logs.rstudio.com/">RStudio CRAN mirror</a>.
+	<a href="https://cran-logs.rstudio.com/">RStudio CRAN mirror</a>.
       </p>
 
       <hr>
@@ -42,21 +41,21 @@ <h3>Badges</h3>
 
       <p>Add a badge with download counts to your homepage or your
 	Github project page. Our badges were generated by
-	<a href="http://shields.io/">shields.io</a>.
+	<a href="https://shields.io/">shields.io</a>.
 
       <p>
       <form>
 	<label>Example</label>
-	<img class="badge" src="http://cranlogs.r-pkg.org/badges/ggplot2">
+	<img class="badge" src="https://cranlogs.r-pkg.org/badges/ggplot2">
 	<label for="package">R Package</label>
 	<input class="u-full-width" type="text" value="ggplot2" id="package"
 	       onkeydown="update()">
 	<label for="url">URL</label>
 	<input class="u-full-width" type="text" readonly="readonly"
-	       value="http://cranlogs.r-pkg.org/badges/ggplot2" id="url">
+	       value="https://cranlogs.r-pkg.org/badges/ggplot2" id="url">
 	<label for="markdown">MarkDown</label>
 	<textarea class="u-full-width" id="markdown" readonly="readonly">
-[![](http://cranlogs.r-pkg.org/badges/ggplot2)](http://cran.rstudio.com/web/packages/ggplot2/index.html)
+[![](https://cranlogs.r-pkg.org/badges/ggplot2)](https://cran.rstudio.com/web/packages/ggplot2/index.html)
 	</textarea>
       </form>
 
@@ -104,7 +103,7 @@ <h3>JSON API</h3>
 
       <p>
 	The server provides a JSON API throught HTTP as well:
-	<pre><code>$ curl http://cranlogs.r-pkg.org/downloads/total/last-week/ggplot2
+	<pre><code>$ curl https://cranlogs.r-pkg.org/downloads/total/last-week/ggplot2
 	  <span class="output">
 [
   {