Improve installation docs and dependencies

docs/installing.rst

@@ -73,8 +73,9 @@ Dependencies
 ~~~~~~~~~~~~
 
 To install lxml from sources, you will need `gcc`, `libxml2`,
-`libxslt1.1` and `python-dev` ::
-  sudo apt-get install gcc libxml2 libxml2-dev libxslt1.1 libxslt1-dev python-dev
+`libxslt1.1` and `python-dev`. python-apt depends on `libapt-pkg-dev`
+
+  sudo apt-get install gcc libxml2 libxml2-dev libxslt1.1 libxslt1-dev python-dev libapt-pkg-dev
 
 Debexpo installation
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~

setup.py

@@ -13,12 +13,15 @@ setup(
     #author_email='',
     #url='',
     install_requires=[
+        "webob==1.0.8",
         "Pylons==1.0",
         "SQLAlchemy>=0.6",
         "Webhelpers>=0.6.1",
         "Babel>=0.9.4",
         "python-debian>=0.1.16",
-        "soaplib>=0.12"],
+        "python-apt",
+        "soaplib>=0.12",
+        ],
     packages=find_packages(exclude=['ez_setup']),
     include_package_data=True,
     test_suite='nose.collector',