Add basic PayPal module

Limitations for now:
* Only French-style (UUU,CC and not UUU.CC) balances; the choice is not left up to the user so
  it's hard to test
* No history (should be easy to add)

modules/paypal/pages.py

@@ -0,0 +1,50 @@
+# -*- coding: utf-8 -*-
+
+# Copyright(C) 2013      Laurent Bachelier
+#
+# This file is part of weboob.
+#
+# weboob is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# weboob 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 Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with weboob. If not, see <http://www.gnu.org/licenses/>.
+
+from decimal import Decimal
+
+from weboob.tools.browser import BasePage
+from weboob.capabilities.bank import Account
+from weboob.tools.capabilities.bank.transactions import FrenchTransaction
+
+__all__ = ['LoginPage', 'AccountPage']
+
+
+class LoginPage(BasePage):
+    def login(self, login, password):
+        self.browser.select_form(name='login_form')
+        self.browser['login_email'] = login
+        self.browser['login_password'] = password
+        self.browser.submit(nologin=True)
+
+
+class AccountPage(BasePage):
+    def get_account(self):
+        account = Account()
+        account.id = u"1"
+        account.label = unicode(self.browser.username)
+        account.type = Account.TYPE_CHECKING
+
+        balance = self.document.xpath('//div[@id="main"]')[0] \
+            .xpath('.//div[@class="col first"]//h3/span[@class="balance"]')[0] \
+            .balance.text_content().strip()
+        account.balance = Decimal(FrenchTransaction.clean_amount(balance))
+        account.currency = account.get_currency(balance)
+
+        return account