FIX: add missing import xlwt for Excel export

Fixes #60

odoo_install.sh

@@ -68,7 +68,7 @@ sudo apt-get install wget git bzr python-pip gdebi-core -y
 
 echo -e "\n---- Install python packages ----"
 sudo apt-get install python-pypdf2 python-dateutil python-feedparser python-ldap python-libxslt1 python-lxml python-mako python-openid python-psycopg2 python-pybabel python-pychart python-pydot python-pyparsing python-reportlab python-simplejson python-tz python-vatnumber python-vobject python-webdav python-werkzeug python-xlwt python-yaml python-zsi python-docutils python-psutil python-mock python-unittest2 python-jinja2 python-pypdf python-decorator python-requests python-passlib python-pil -y
-sudo pip3 install pypdf2 Babel passlib Werkzeug decorator python-dateutil pyyaml psycopg2 psutil html2text docutils lxml pillow reportlab ninja2 requests gdata XlsxWriter vobject python-openid pyparsing pydot mock mako Jinja2 ebaysdk feedparser
+sudo pip3 install pypdf2 Babel passlib Werkzeug decorator python-dateutil pyyaml psycopg2 psutil html2text docutils lxml pillow reportlab ninja2 requests gdata XlsxWriter vobject python-openid pyparsing pydot mock mako Jinja2 ebaysdk feedparser xlwt
 
 echo -e "\n---- Install python libraries ----"
 # This is for compatibility with Ubuntu 16.04. Will work on 14.04, 15.04 and 16.04