iucr.layout: use Item_Environment for a style as proposed by Jürgen

- IUCr-article.lyx: update template accordingly

lib/layouts/iucr.layout

@@ -230,31 +230,23 @@ End
 Style Acknowledgements
   CopyStyle			"Short Author"
   LatexName			ack
+  InTitle			0
   LabelString		"Acknowledgements:"
   Category			BackMatter
   TopSep			0.7
 End
 
-InsetLayout "Flex:References"
-  CopyStyle			"Flex:City"
-  LatexType			Environment
-  LatexName			references
-  Decoration		Classic
-  ForcePlain		0
-  Spellcheck		0
-  ParbreakIsNewline	1
-  FreeSpacing		1
-  KeepEmpty			1
-  LabelString		"References"
-  LabelFont
-    Color			Green
-  EndFont
-End
-
-Style Reference
-  CopyStyle			"Short Author"
-  LatexName			reference
+Style References
+  Margin			Manual
   Category			BackMatter
-  LabelString		"Reference:"
+  LatexType			List_Environment
+  LatexName			references
+  ItemCommand		reference
+  NextNoIndent		1
+  Argument item:1
+    LabelString		"Reference"
+    Mandatory		1
+    AutoInsert		1
+  EndArgument
   Align				Left
 End

lib/templates/IUCr-article.lyx

@@ -554,6 +554,13 @@ A citation:
 LatexCommand cite
 key "lamport86"
 
+\end_inset
+
+ and another one: 
+\begin_inset CommandInset citation
+LatexCommand cite
+key "pauling89"
+
 \end_inset
 
 
@@ -782,14 +789,40 @@ Acknowledgment text
 \end_layout
 
 \begin_layout Standard
-You can either use plain references:
-\end_layout
+\begin_inset VSpace bigskip
+\end_inset
 
-\begin_layout Standard
-\begin_inset Flex References
+You can either use plain references:
+\begin_inset Note Note
 status open
 
-\begin_layout Reference
+\begin_layout Plain Layout
+Pressing 
+\family sans
+Return
+\family default
+ in a 
+\family sans
+References
+\family default
+ environment adds a new 
+\family sans
+Reference
+\family default
+ inset.
+ Insert one reference in each inset.
+\end_layout
+
+\end_inset
+
+
+\end_layout
+
+\begin_layout References
+\begin_inset Argument item:1
+status open
+
+\begin_layout Plain Layout
 Parthé, E.
  & Gelato, L.
  (1984).
@@ -804,7 +837,16 @@ Acta Cryst.
 , 169–183.
 \end_layout
 
-\begin_layout Reference
+\end_inset
+
+
+\end_layout
+
+\begin_layout References
+\begin_inset Argument item:1
+status open
+
+\begin_layout Plain Layout
 Rauch, H.
  & Petrascheck, D.
  (1976).