Merge pull request #603 from shiroginne/update-readme-with-examples

Update README.md with examples for Super Advanced Usage

README.md

@@ -268,9 +268,20 @@ pdf = WickedPdf.new.pdf_from_url('https://github.com/mileszs/wicked_pdf')
 
 # create a pdf from string using templates, layouts and content option for header or footer
 pdf = WickedPdf.new.pdf_from_string(
-  render_to_string('templates/pdf', layout: 'pdfs/layout_pdf'),
+  render_to_string('templates/pdf', layout: 'pdfs/layout_pdf.html'),
   footer: {
-    content: render_to_string(layout: 'pdfs/layout_pdf')
+    content: render_to_string(
+  		'templates/footer',
+  		layout: 'pdfs/layout_pdf.html'
+  	)
+  }
+)
+
+# It is possible to use footer/header templates without a layout, in that case you need to provide a valid HTML document
+pdf = WickedPdf.new.pdf_from_string(
+  render_to_string('templates/full_pdf_template'),
+  header: {
+    content: render_to_string('templates/full_header_template')
   }
 )