plugin-dev: rename "other" subdir to "element-types"

https://bugzilla.gnome.org/show_bug.cgi?id=773976

markdown/plugin-development/appendix/porting.md

@@ -60,7 +60,7 @@ also need a rewrite, which will take about the same amount of time.
     from `GstBaseSrc` and `GstBaseSink`. Audio sinks or sources could
     even derive from audio-specific base classes. All existing base
     classes have been discussed in [Pre-made base
-    classes](plugin-development/other/base.md) and the next few chapters.
+    classes](plugin-development/element-types/base.md) and the next few chapters.
 
   - In 0.10, event handling and buffers are separated once again. This
     means that in order to receive events, one no longer has to set the

markdown/plugin-development/building/statemanage-states.md

@@ -52,7 +52,7 @@ card or render video pictures to an image sink.
 ## Managing filter state
 
 If at all possible, your element should derive from one of the new base
-classes ([Pre-made base classes](plugin-development/other/base.md)). There are
+classes ([Pre-made base classes](plugin-development/element-types/base.md)). There are
 ready-made general purpose base classes for different types of sources,
 sinks and filter/transformation elements. In addition to those,
 specialised base classes exist for audio and video elements and others.

markdown/plugin-development/introduction/preface.md

@@ -226,11 +226,11 @@ As you can see, there a lot to learn, so let's get started\!
 [interfaces]: plugin-development/advanced/interfaces.md
 [tagging]: plugin-development/advanced/tagging.md
 [events]: plugin-development/advanced/events.md
-[element-types]: plugin-development/other/index.md
-[base-classes]: plugin-development/other/base.md
-[one-to-n]: plugin-development/other/oneton.md
-[n-to-one]: plugin-development/other/ntoone.md
-[manager]: plugin-development/other/manager.md
+[element-types]: plugin-development/element-types/index.md
+[base-classes]: plugin-development/element-types/base.md
+[one-to-n]: plugin-development/element-types/oneton.md
+[n-to-one]: plugin-development/element-types/ntoone.md
+[manager]: plugin-development/element-types/manager.md
 [appendix]: plugin-development/appendix/index.md
 [intro-elements]: plugin-development/introduction/basics.md#elements-and-plugins
 [intro-pads]: plugin-development/introduction/basics.md#pads

sitemap.txt

@@ -123,11 +123,11 @@ index.md
 			plugin-development/advanced/dparams.md
 			plugin-development/advanced/interfaces.md
 			plugin-development/advanced/tagging.md
-		plugin-development/other/index.md
-			plugin-development/other/base.md
-			plugin-development/other/oneton.md
-			plugin-development/other/ntoone.md
-			plugin-development/other/manager.md
+		plugin-development/element-types/index.md
+			plugin-development/element-types/base.md
+			plugin-development/element-types/oneton.md
+			plugin-development/element-types/ntoone.md
+			plugin-development/element-types/manager.md
 		plugin-development/appendix/index.md
 			plugin-development/appendix/checklist-element.md
 			plugin-development/appendix/porting.md