update documentation

Author: chfw

README.rst

@@ -79,8 +79,8 @@ The highlighted features are:
                             mediawiki, html,                        3.5, pypy, pypy3
                             latex, grid, pipe,
                             orgtbl, plain simple
-   `pyexcel-handsontable`_  handsontable in html    `handsontable`_ same as above
-   `pyexcel-chart`_         svg chart               `pygal`_        same as above
+   `pyexcel-handsontable`_  handsontable in html    `handsontable`_ same as above [#f3]_
+   `pyexcel-pygal`_         svg chart               `pygal`_        same as above [#f3]_
    ======================== ======================= =============== ==================
 
 .. _pyexcel-io: https://github.com/pyexcel/pyexcel-io
@@ -102,8 +102,19 @@ The highlighted features are:
 .. _tabulate: https://bitbucket.org/astanin/python-tabulate
 .. _pyexcel-handsontable: https://github.com/pyexcel/pyexcel-handsontable
 .. _handsontable: https://cdnjs.com/libraries/handsontable
-.. _pyexcel-chart: https://github.com/pyexcel/pyexcel-chart
+.. _pyexcel-pygal: https://github.com/pyexcel/pyexcel-chart
 .. _pygal: https://github.com/Kozea/pygal
+.. _pyexcel-matplotlib: https://github.com/pyexcel/pyexcel-matplotlib
+.. _matplotlib: https://matplotlib.org
+
+.. [#f3] coming soon
+
+In order to manage the list of plugins installed, you need to use pip to add or remove
+a plugin. When you use virtualenv, you can have different plugins per virtual
+environment. In the situation where you have multiple plugins that does the same thing
+in your environment, you need to tell pyexcel which plugin to use per function call.
+For example, pyexcel-ods and pyexcel-odsr, and you want to get_array to use pyexcel-odsr.
+You need to append get_array(..., library='pyexcel-odsr').
 
 .. rubric:: Footnotes
 

doc/requirements.txt

@@ -0,0 +1,2 @@
+sphinxcontrib-spelling
+

doc/source/index.rst

@@ -74,8 +74,8 @@ The highlighted features are:
                             mediawiki, html,                        3.5, pypy, pypy3
                             latex, grid, pipe,
                             orgtbl, plain simple
-   `pyexcel-handsontable`_  handsontable in html    `handsontable`_ same as above
-   `pyexcel-chart`_         svg chart               `pygal`_        same as above
+   `pyexcel-handsontable`_  handsontable in html    `handsontable`_ same as above [#f3]_
+   `pyexcel-pygal`_         svg chart               `pygal`_        same as above [#f3]_
    ======================== ======================= =============== ==================
 
 .. _pyexcel-io: https://github.com/pyexcel/pyexcel-io
@@ -97,8 +97,19 @@ The highlighted features are:
 .. _tabulate: https://bitbucket.org/astanin/python-tabulate
 .. _pyexcel-handsontable: https://github.com/pyexcel/pyexcel-handsontable
 .. _handsontable: https://cdnjs.com/libraries/handsontable
-.. _pyexcel-chart: https://github.com/pyexcel/pyexcel-chart
+.. _pyexcel-pygal: https://github.com/pyexcel/pyexcel-chart
 .. _pygal: https://github.com/Kozea/pygal
+.. _pyexcel-matplotlib: https://github.com/pyexcel/pyexcel-matplotlib
+.. _matplotlib: https://matplotlib.org
+
+.. [#f3] coming soon
+
+In order to manage the list of plugins installed, you need to use pip to add or remove
+a plugin. When you use virtualenv, you can have different plugins per virtual
+environment. In the situation where you have multiple plugins that does the same thing
+in your environment, you need to tell pyexcel which plugin to use per function call.
+For example, pyexcel-ods and pyexcel-odsr, and you want to get_array to use pyexcel-odsr.
+You need to append get_array(..., library='pyexcel-odsr').
 
 .. rubric:: Footnotes