Add float option to chapter start

README.md

@@ -112,7 +112,7 @@ Our guiding principles for development of this namespace is "[Rules for Standard
    mime type is.  In that scenario, time codes are assumed to be present in the file in some capacity.
 
 
-- **\<podcast:chapter start="[(int)]" title="[(string)]" href="[uri to content]" type="[mime type]"/>**
+- **\<podcast:chapter start="[(int or float)]" title="[(string)]" href="[uri to content]" type="[mime type]"/>**
 
    Item
 
@@ -120,9 +120,9 @@ Our guiding principles for development of this namespace is "[Rules for Standard
 
    This element specifies a point in time during the podcast that can be linked to directly and optionally supplemented with additional content.
    `start` is required to identify the starting point of the chapter within the podcast. Start time is expressed as seconds since the start time of the podcast.
-   `title` is optional and is used as a user facing identifier for this chapter
-   `href` is optional and points to additional user facing content
-   `type` is optional but it is strongly encouraged if `href` is used so that clients can handle the chapter content appropriately
+   `title` is optional and is used as a user facing identifier for this chapter.
+   `href` is optional and points to additional user facing content.
+   `type` is optional but it is strongly encouraged if `href` is used so that clients can handle the chapter content appropriately.
 
 
 - **\<podcast:alternateEnclosure type="[mime type]" length="[(int)]" bitrate="[(float)]" title="[(string)]" stream>**[uri of media asset]**\</podcast:alternateEnclosure>**