interface update

Author: chfw

README.rst

@@ -1,6 +1,6 @@
-===========
-pyexcel-xl
-===========
+=============
+pyexcel-xlsx
+=============
 
 .. image:: https://travis-ci.org/chfw/pyexcel-xlsx.svg
     :target: https://travis-ci.org/chfw/pyexcel-xlsx
@@ -17,7 +17,7 @@ pyexcel-xl
 .. image:: https://pypip.in/implementation/pyexcel-xlsx/badge.png
     :target: https://pypi.python.org/pypi/pyexcel-xlsx
 
-**pyexcel-xlsx** is a tiny wrapper library to read, manipulate and write data in xls, xlsx and xlsm fromat. You are likely to use it with `pyexcel <https://github.com/chfw/pyexcel>`__. 
+**pyexcel-xlsx** is a tiny wrapper library to read, manipulate and write data in xlsx and xlsm fromat using openpyxl. You are likely to use it with `pyexcel <https://github.com/chfw/pyexcel>`__. 
 
 Installation
 ============

pyexcel_xlsx/__init__.py

@@ -33,7 +33,10 @@ class XLSXSheet(SheetReader):
     """
     def __init__(self, sheet):
         SheetReader.__init__(self, sheet)
-        self.name = sheet.title
+
+    @property
+    def name(self):
+        return self.native_sheet.title
 
     def number_of_rows(self):
         """