Added an elementary stylesheet to TW5

tiddlywiki5/styles.css

@@ -0,0 +1,39 @@
+body {
+    font-family: Helvetica Neue, Helvetica, Arial, sans-serif;
+}
+
+/* Following styles created with http://www.gridlover.net/; */
+
+body {
+    font-size: 18px;
+    line-height: 27px;
+}
+article {
+    max-width: 944px;
+    margin: auto;
+}
+h1 {
+    font-size: 62px;
+    line-height: 81px;
+    margin-top: 27px;
+    margin-bottom: 54px;
+}
+h2 {
+    font-size: 33px;
+    line-height: 54px;
+    margin-top: 54px;
+    margin-bottom: 27px;
+}
+h3 {
+    font-size: 25px;
+    line-height: 27px;
+    margin-top: 27px;
+    margin-bottom: 0px;
+}
+p, ul {
+    margin-top: 0px;
+    margin-bottom: 27px;
+}
+small, aside {
+    font-size: 13px;
+}

tiddlywiki5/tiddlywiki5.recipe

@@ -1,5 +1,6 @@
 template: tiddlywiki5.template.html
 copyright: ../copyright.txt
+style: styles.css
 
 jslib: ../test/tiddlywiki.2.6.5/source/tiddlywiki/jquery/jquery.js