Add link to Split module, update anchor tags

README.md

@@ -78,8 +78,9 @@ Example:
 ---
 
 # Filters:
-* [XPath Module](https://github.com/feediron/ttrss_plugin-feediron/tree/master/filters/fi_mod_xpath) - `"type":"xpath"`
-* [Readability Module](https://github.com/feediron/ttrss_plugin-feediron/tree/master/filters/fi_mod_readability) - "type":"readability"
+* [XPath Module](https://github.com/feediron/ttrss_plugin-feediron/tree/master/filters/fi_mod_xpath#readme) - `"type":"xpath"`
+* [Split Module](https://github.com/feediron/ttrss_plugin-feediron/tree/master/filters/fi_mod_split#readme) - `type":"split"`
+* [Readability Module](https://github.com/feediron/ttrss_plugin-feediron/tree/master/filters/fi_mod_readability#readme) - `"type":"readability"`
 * [tags](#tags-filter) - `"tags":"{options}"`
 	* [xpath](#tags-type-xpath---type-xpath) - `"type": "xpath"`
 		* [xpath](#tags-xpath---xpathxpath-str---array-of-xpath-str-) - `"xpath":"xpath str" / [ "array of xpath str" ]`