Update docs for the new RTL direction option

doc/index.docbook

@@ -37,8 +37,8 @@ Context menu actions like Rename Bookmarks etc.)
 			<!-- TRANS:ROLES_OF_TRANSLATORS -->
 		</authorgroup>
 		<legalnotice>&FDLNotice;</legalnotice>
-		<date>2015-09-17</date>
-		<releaseinfo>0.24 (Applications 15.12)</releaseinfo>
+		<date>2016-07-26</date>
+		<releaseinfo>0.26 (Applications 16.08)</releaseinfo>
 		<!-- Abstract about this handbook -->
 		<abstract>
 			<para>&okular; is a &kde; universal document viewer based on &kpdf; code.</para>
@@ -2138,6 +2138,14 @@ Context menu actions like Rename Bookmarks etc.)
 							use the backend with the highest priority.</para>
 					</listitem>
 				</varlistentry>
+				<varlistentry>
+					<term><guilabel>Right to left reading direction</guilabel></term>
+					<listitem>
+						<para>
+						  Whether to use right to left reading direction by default for the opened files. Can be useful for <ulink url="https://en.wikipedia.org/wiki/Right-to-left">some writing systems</ulink>.
+						</para>
+					</listitem>
+				</varlistentry>
 				<varlistentry>
 					<term><guilabel>Overview columns</guilabel></term>
 					<listitem>