update marketing

Author: ap

Diff for: README.md

@@ -1,8 +1,10 @@
-<img src="http://ap.github.io/vim-css-color/screenshot.png" alt=""/>
+<h1 align="center">CSS Color</h1>
 
-A very fast color keyword highlighter for Vim with context-sensitive support
-for many language syntaxes.
+<div align="center">
+A very fast, multi-syntax context-sensitive color name highlighter<br>
+<img src="https://raw.githubusercontent.com/ap/vim-css-color/a56592557e487b7299a7c7dcc3333282a157b4ba/screenshot.png" width="844" height="553">
+</div>
 
-<sub>Originally based on code
+<sub>Inspired
 by  [Niklas Hofer](http://www.vim.org/scripts/script.php?script_id=2150)
 and [Max Vasiliev](https://github.com/skammer/vim-css-color).</sub>