Add AnimationTrackFilter and its Editor plugin.

doc/classes/AnimationNode.xml

@@ -142,10 +142,10 @@
 			<return type="Variant" />
 			<param index="0" name="name" type="StringName" />
 			<description>
-				Gets the value of a parameter. Parameters are custom local memory used for your animation nodes, given a resource can be reused in multiple trees.
+				Gets the value of a parameter. Parameters are custom local memory used for your nodes, given a resource can be reused in multiple trees.
 			</description>
 		</method>
-		<method name="is_path_filtered" qualifiers="const">
+		<method name="is_path_filtered" qualifiers="const" is_deprecated="true">
 			<return type="bool" />
 			<param index="0" name="path" type="NodePath" />
 			<description>
@@ -159,7 +159,7 @@
 				Removes an input, call this only when inactive.
 			</description>
 		</method>
-		<method name="set_filter_path">
+		<method name="set_filter_path" is_deprecated="true">
 			<return type="void" />
 			<param index="0" name="path" type="NodePath" />
 			<param index="1" name="enable" type="bool" />
@@ -185,8 +185,8 @@
 		</method>
 	</methods>
 	<members>
-		<member name="filter_enabled" type="bool" setter="set_filter_enabled" getter="is_filter_enabled">
-			If [code]true[/code], filtering is enabled.
+		<member name="filter_enabled" type="bool" setter="set_filter_enabled" getter="is_filter_enabled" is_deprecated="true">
+			Deprecated, sets this property will do noting, gets will return [code]false[/code].
 		</member>
 	</members>
 	<signals>

doc/classes/AnimationTrackFilter.xml

@@ -0,0 +1,51 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<class name="AnimationTrackFilter" inherits="Resource" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../class.xsd">
+	<brief_description>
+		A filter to describe [AnimationNode]'s filters.
+	</brief_description>
+	<description>
+		A filter to describe [AnimationNode]'s filters.
+	</description>
+	<tutorials>
+	</tutorials>
+	<methods>
+		<method name="clear_tracks">
+			<return type="void" />
+			<description>
+				Clear all tracks.
+			</description>
+		</method>
+		<method name="get_track_amount" qualifiers="const">
+			<return type="float" />
+			<param index="0" name="track_path" type="NodePath" />
+			<description>
+			</description>
+		</method>
+		<method name="has_trck" qualifiers="const">
+			<return type="bool" />
+			<param index="0" name="track_path" type="NodePath" />
+			<description>
+				Return [code]true[/code] if has [param track_path].
+			</description>
+		</method>
+		<method name="remove_track">
+			<return type="void" />
+			<param index="0" name="track_path" type="NodePath" />
+			<description>
+				Remove track, will do noting if this filter have not [param track_path].
+			</description>
+		</method>
+		<method name="set_track">
+			<return type="void" />
+			<param index="0" name="track_path" type="NodePath" />
+			<param index="1" name="amount" type="float" default="1.0" />
+			<description>
+			</description>
+		</method>
+	</methods>
+	<members>
+		<member name="tracks" type="Dictionary" setter="set_tracks" getter="get_tracks" default="{}">
+			A array of animation tracks' Nodepath which should be filtered.
+		</member>
+	</members>
+</class>