commonified in_words function and introduced selling_controller
diff --git a/controllers/selling_controller.py b/controllers/selling_controller.py
new file mode 100644
index 0000000..8dd1882
--- /dev/null
+++ b/controllers/selling_controller.py
@@ -0,0 +1,33 @@
+# ERPNext - web based ERP (http://erpnext.com)
+# Copyright (C) 2012 Web Notes Technologies Pvt Ltd
+# 
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+# 
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+from __future__ import unicode_literals
+import webnotes
+from setup.utils import get_company_currency
+
+from utilities.transaction_base import TransactionBase
+class SellingController(TransactionBase):
+	def validate(self):
+		self.set_total_in_words()
+		
+	def set_total_in_words(self):
+		from webnotes.utils import money_in_words
+		company_currency = get_company_currency(self.doc.company)
+		if self.meta.get_field("in_words"):
+			self.doc.in_words = money_in_words(self.doc.rounded_total, company_currency)
+		if self.meta.get_field("in_words_export"):
+			self.doc.in_words_export = money_in_words(self.doc.rounded_total_export,
+		 		self.doc.currency)
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