diff --git a/README.MD b/README.MD
index 24ecb9d..e21eb5e 100644
--- a/README.MD
+++ b/README.MD
@@ -8,10 +8,18 @@ This Template is adopted from the original one with some minor changes:
 - Altered spacing and fields due to DIN 5008
 - Moved zip-code in front of city
 
+This Template has hardcoded German text.
+
 ## Installation
 
 Simply add the files into `application/views/invoice_templates/pdf` and select them in Invoiceplane's *System Settings -> Invoices* as PDF templates.
 
+### Extra fields
+
+You can add a "Leistungszeitraum" for any invoice by defining the two custom date fields: `Leistungszeitraum-Anfang` and `Leistungszeitraum-Ende`. These will not be shown on the invoice if either is not set.
+
+You can also add a description text for the full invoice by adding a text custom field called `Beschreibung`.
+
 ## Example
 
 ![Screenshot](screenshot.png)
diff --git a/teutat3s.php b/momo.php
similarity index 87%
rename from teutat3s.php
rename to momo.php
index a1c7e2f..ced7fcb 100644
--- a/teutat3s.php
+++ b/momo.php
@@ -103,49 +103,49 @@ footer .notes {
 <div id="pm-3"><hr /></div>
 
 <div id="client">
-	<div id="sichtfenster-absender">
-		<?php
-		   echo htmlsc($invoice->user_name) . ' - ' . htmlsc($invoice->user_address_1) . ' - ' . htmlsc($invoice->user_zip) . ' ' . htmlsc($invoice->user_city);
-		?>
-		<hr />
-	</div>
-	<div>
-		<b><?php _htmlsc(format_client($invoice)); ?></b>
-	</div>
-	<?php if ($invoice->client_vat_id) {
-		echo '<div>' . trans('vat_id_short') . ': ' . $invoice->client_vat_id . '</div>';
-	}
-	if ($invoice->client_tax_code) {
-		echo '<div>' . trans('tax_code_short') . ': ' . $invoice->client_tax_code . '</div>';
-	}
-	if ($invoice->client_address_1) {
-		echo '<div>' . htmlsc($invoice->client_address_1) . '</div>';
-	}
-	if ($invoice->client_address_2) {
-		echo '<div>' . htmlsc($invoice->client_address_2) . '</div>';
-	}
-	if ($invoice->client_city || $invoice->client_state || $invoice->client_zip) {
-		echo '<div>';
+  <div id="sichtfenster-absender">
+    <?php
+      echo htmlsc($invoice->user_name) . ' - ' . htmlsc($invoice->user_address_1) . ' - ' . htmlsc($invoice->user_zip) . ' ' . htmlsc($invoice->user_city);
+    ?>
+    <hr />
+  </div>
+  <div>
+    <b><?php _htmlsc(format_client($invoice)); ?></b>
+  </div>
+  <?php if ($invoice->client_vat_id) {
+    echo '<div>' . trans('vat_id_short') . ': ' . $invoice->client_vat_id . '</div>';
+  }
+  if ($invoice->client_tax_code) {
+    echo '<div>' . trans('tax_code_short') . ': ' . $invoice->client_tax_code . '</div>';
+  }
+  if ($invoice->client_address_1) {
+    echo '<div>' . htmlsc($invoice->client_address_1) . '</div>';
+  }
+  if ($invoice->client_address_2) {
+    echo '<div>' . htmlsc($invoice->client_address_2) . '</div>';
+  }
+  if ($invoice->client_city || $invoice->client_state || $invoice->client_zip) {
+    echo '<div>';
     if ($invoice->client_zip) {
-			echo htmlsc($invoice->client_zip) . ' ';
-		}
-		if ($invoice->client_city) {
-			echo htmlsc($invoice->client_city) . ' ';
-		}
-		if ($invoice->client_state) {
-			echo htmlsc($invoice->client_state);
-		}
-		echo '</div>';
-	}
-	if ($invoice->client_country) {
-		echo '<div>' . get_country_name(trans('cldr'), $invoice->client_country) . '</div>';
-	}
+      echo htmlsc($invoice->client_zip) . ' ';
+    }
+    if ($invoice->client_city) {
+      echo htmlsc($invoice->client_city) . ' ';
+    }
+    if ($invoice->client_state) {
+      echo htmlsc($invoice->client_state);
+    }
+    echo '</div>';
+  }
+  if ($invoice->client_country) {
+    echo '<div>' . get_country_name(trans('cldr'), $invoice->client_country) . '</div>';
+  }
 
-	echo '<br/>';
+  echo '<br/>';
 
-	if ($invoice->client_phone) {
-		echo '<div>' . trans('phone_abbr') . ': ' . htmlsc($invoice->client_phone) . '</div>';
-	} ?>
+  if ($invoice->client_phone) {
+    echo '<div>' . trans('phone_abbr') . ': ' . htmlsc($invoice->client_phone) . '</div>';
+  } ?>
 </div>
 
 <header class="clearfix">
@@ -156,7 +156,7 @@ footer .notes {
 
   <h1 class="invoice-title"><?php echo trans('invoice'); ?></h1>
 
-	<!-- client is extracted due to absolute position -->
+  <!-- client is extracted due to absolute position -->
 
   <div id="company">
     <div><b><?php _htmlsc($invoice->user_name); ?></b></div>