Rename render-content to render-text for clarity. Retroactively add to 0.9.3.

NEWS.md

 ## Changes for 0.9.3 (2013-04-16):
 
 * **INCOMPATIBLE CHANGE**: `page-path` and the `blog` config class are no longer exported.
+* **INCOMPATIBLE CHANGE**: `render-content` has been renamed `render-text` for clarity.
 * New Docs: [A Hacker's Guide to Coleslaw](hacking_guide) and [Themes](theming_guide)!
 * A new theme *readable* based on bootswatch readable, courtesy of @rmoritz!
 * Posts may have an author to support multi-user blogs courtesy of @tychoish.

docs/plugin-api.md

 
 * **New markup formats**, for example the
   [ReStructuredText plugin](http://github.com/redline6561/coleslaw/blob/master/plugins/rst.lisp),
-  can be created by definining an appropriate `render-content`
+  can be created by definining an appropriate `render-text`
   method. The method takes `text` and `format` arguments and is
   [EQL-specialized](http://www.gigamonkeys.com/book/object-reorientation-generic-functions.html#defmethod)
   on the format. Format should be a keyword matching the file

plugins/rst.lisp

 
 (defpackage :coleslaw-rst
   (:use :cl)
-  (:import-from :coleslaw #:render-content)
+  (:import-from :coleslaw #:render-text)
   (:import-from :docutils #:read-rst #:write-part #:register-settings-spec
                           #:visit-node #:write-document)
   (:import-from :docutils.writer.html #:html-writer #:write-part)
 
 (in-package :coleslaw-rst)
 
-(defmethod render-content (text (format (eql :rst)))
+(defmethod render-text (text (format (eql :rst)))
   (register-settings-spec '((:generator nil)
                             (:datestamp nil)))
   (with-output-to-string (str)

src/coleslaw.lisp

            (content (construct content-type (read-content file))))
       (write-page "tmp.html" (render-page content)))))
 
-(defgeneric render-content (text format)
-  (:documentation "Compile TEXT from the given FORMAT to HTML for display.")
+(defgeneric render-text (text format)
+  (:documentation "Render TEXT of the given FORMAT to HTML for display.")
   (:method (text (format (eql :html)))
     text)
   (:method (text (format (eql :md)))

src/packages.lisp

            #:content
            #:post
            #:index
-           #:render-content
+           #:render-text
            #:add-injection
            ;; The Document Protocol
            #:add-document

src/posts.lisp

                    (text content-text)) object
       (setf (content-slug object) (slugify title)
             format (make-keyword (string-upcase format))
-            text (render-content text format)
+            text (render-text text format)
             author (or author (author *config*)))))
 
 (defmethod render ((object post) &key prev next)