Added xml UI for the avfilter.colortemperature

data/effects/avfilter/avfilter_colortemperature.xml

+<!DOCTYPE kpartgui>
+<effect tag="avfilter.colortemperature" id="avfilter.colortemperature">
+	<name>Color Temperature</name>
+	<description>Adjust color temperature in video to simulate variations in ambient color temperature. </description>
+	<author>libavfilter</author>
+	<parameter type="animated" name="av.temperature" default="6500" min="1000" max="40000" decimals="1" suffix="°K">
+                <name>Temperature</name>
+        </parameter>
+        <parameter type="animated" name="av.mix" default="1" min="0" max="1" decimals="3">
+                <name>Mix</name>
+        </parameter>
+        <parameter type="animated" name="av.saturation" default="0.5" min="0" max="1" decimals="3">
+                <name>Saturation</name>
+        </parameter>
+       <parameter type="animated" name="av.pl" default="0" min="0" max="1" decimals="3">
+                <name>Preserve lightness</name>
+        </parameter>
+</effect>