added missing packages : gettext and python-psycopg2, and fixed some README wording (#21998)

README.rst

@@ -15,12 +15,13 @@ Install dependencies
 .. code-block:: bash
 
     pip install --user -r requirements.txt
+    source ~/.profile
 
 
 System requirements
 +++++++++++++++++++
 
-* postgresql server must be installed
+* postgresql server (version 9.x is adviced) must be installed
 * the system's user running the install.yml playbook must be a sudoer
 * configure postgresql in order to have this configuration:
 
@@ -28,14 +29,14 @@ System requirements
   * postgresql must have a postgres user authorized to connect and create a db.
   * please edit /etc/postgresql/[INSTALLED VERSION]/main/pg_hba.conf and add these lines (if not present):
 
+First line allows postgres user to have all privileges on locahost
+Second line allows to have the system's user mapped to postgresql username and its own database with the same name
+
 .. code-block:: configuration
 
   local   all     postgres    trust
   local   all     all         peer
 
-First line allows postgres user to have all privileges on locahost
-Second line allows to have the system's user mapped to postgresql username and its own database with the same name
-
 
 Configure local DNS
 -------------------

roles/base/tasks/main.yml

@@ -14,6 +14,8 @@
        - python-lasso
        - python-pip
        - python-virtualenv
+       - python-psycopg2
+       - gettext
        - rabbitmq-server
        - ruby-sass
        - supervisor
@@ -26,7 +28,7 @@
 - name: create the virtualenv and install django
   pip:
     name: django
-    version: "{{ django_version}}"
+    version: "{{django_version}}"
     virtualenv: "{{venv}}"
 
 - name: "create {{src_dir}} directory"