Added doc

MANIFEST.in

@@ -7,3 +7,4 @@ include LICENSE
 include *.xml
 include *.odt
 include *.csv
+include doc/*

doc/index.rst

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+Stock Supply Day Module
+#######################
+
+The Stock Supply Day module adds a Week Days list on the Product
+Supplier form. This allow to restrict the supply week days for each
+supplier on each product. If no days are defined for a supplier a
+supplying may happens at any day of the week.
+
+For example, those week days are taken into account when computing the
+planned date of stock moves created by the purchase (defined in the
+Purchase module) and by the scheduler that generates the Purchase
+Requests (defined in the Stock Supply module).