do some trivial cleanups in README

Signed-off-by: Brian S. Stephan <bss@incorporeal.org>

README.md

@@ -14,19 +14,19 @@ Something like the following should suffice:
 % incorporealcms-build ./path/to/instance ./path/to/output/www/root
 ```
 
-This will generate the directory suitable for serving by e.g. Nginx.
+This will generate the directory suitable for serving by e.g. nginx.
 
 ## Creating a Site
 
 Put content, notably Markdown content, inside `./your-instance/pages/` and when you are ready, run the build command
 above. When you run `incorporealcms-build`, the following happens:
 
-* Markdown files (ending in `.md`) are rendered via Python-Markdown as .html files and output to the static site
+* Markdown files (ending in `.md`) are rendered via Python-Markdown as `.html` files and output to the static site
   directory. The `.md` files are also copied there, though this behavior may be toggleable in the future.
     * Directory paths (e.g. a request to `/dir/`) can be served via a `/dir/index.md` file, which will generate
       `/dir/index.html`, with the appropriate web server configuration to use `index.html` for directory listings.
 * Symlinks to files are retained and mirrored into the output directory, and handled per the web server's configuration,
-  whanever it is.
+  whatever it is.
 * All other files are copied directly, so images, text files, etc., can be referenced naturally as URLs.
 
 ## Configuration