Update pageSizeW and pageSizeH docs

Conflicts:
	docs/containers.rst

docs/styles.rst

@@ -8,6 +8,8 @@ Section
 
 Below are the available styles for section:
 
+-  ``pageSizeW`` Page width in twips (the default is 11906/A4 size)
+-  ``pageSizeH`` Page height in twips (the default is 16838/A4 size)
 -  ``orientation`` Page orientation, i.e. 'portrait' (default) or
    'landscape'
 -  ``marginTop`` Page margin top in twips
@@ -30,12 +32,6 @@ Below are the available styles for section:
 -  ``breakType`` Section break type (nextPage, nextColumn, continuous,
    evenPage, oddPage)
 
-The following two styles are automatically set by the use of the
-``orientation`` style. You can alter them but that's not recommended.
-
--  ``pageSizeW`` Page width in twips
--  ``pageSizeH`` Page height in twips
-
 Font
 ----