Merge branch 'master' into dependency-types

doc/todo/dependency_types.mdwn

@@ -379,6 +379,8 @@ Given that, the `backlink` will always be evalulated, and will put index
 onto the influence list. If we combine the influences from each
 successful match, we get the right result.
 
+> This is implemented, seems to work ok. --[[Joey]] 
+
 #### High-level Calculation and Storage
 
 Calculating the full influence list for a pagespec requires trying to match
@@ -409,3 +411,14 @@ Where to store the influence list? Well, it appears that we can just add
 regular list of simple dependencies. So, the data stored ends up looking
 just like what is stored today by the explicit dependency hacks. Except,
 it's calculated more smartly, and is added automatically.
+
+> I've implemented influence calculation in `add_depends`. As expected,
+> it means rather a lot more work, and makes some things much slower.
+> Optimisation via `pagespec_match_depends` next.. --[[Joey]] 
+
+#### Influence types
+
+Note that influences can also have types, same as dependency types.
+For example, "backlink(foo)" has an influence of foo, of type links.
+"created_before(foo)" also is influenced by foo, but it's a presence
+type. Etc.