Try to get to a minimal requirements.txt

requirements.txt

@@ -1,126 +1,2 @@
 # Install custom version of scraperwiki library
 -e git+http://github.com/openaustralia/scraperwiki-python.git@morph_defaults#egg=scraperwiki
-
-# numpy, gemsim, matplotlib, pandas, scipy are commented out because
-# all those libraries require numpy
-# it looks like the python heroku buildpack doesn't support the installation of numpy
-
-#numpy==1.6.1
-BeautifulSoup==3.2.0
-Creoleparser==0.7.4
-Genshi==0.6
-Jinja2==2.6
-Markdown==2.2.0
-Pygments==1.4
-SQLAlchemy==0.6.6
-Twisted==11.1.0
-Unidecode==0.04.9
-anyjson==0.3.3
-argparse==1.2.1
-beautifulsoup4==4.1.3
-bitlyapi==0.1.1
-blinker==1.2
-cartodb==0.6
-certifi==0.0.8
-chardet==2.1.1
-ckanclient==0.10
-colormath==1.0.8
-csvkit==0.3.0
-dataset==0.5.2
-demjson==1.6
-dropbox==1.4
-errorhandler==1.1.1
-feedparser==5.0.1
-fluidinfo.py==1.1.2
-gdata==2.0.15
-geopy==0.94.1
-gevent==0.13.6
-google-api-python-client==1.0beta8
-googlemaps==1.0.2
-greenlet==0.3.2
-html5lib==0.90
-httplib2==0.7.4
-imposm.parser==1.0.3
-jellyfish==0.2.0
-mechanize==0.2.5
-mock==0.7.2
-networkx==1.6
-ngram==3.3.0
-nose==1.1.2
-oauth2==1.5.170
-oauth==1.0.1
-oauthlib==0.1.2
-openpyxl==1.5.7
-ordereddict==1.1
-pbkdf2==1.3
-pdfminer==20110515
-pexpect==2.4
-pipe2py==0.9.2
-pyOpenSSL==0.13
-pycrypto==2.5
-pycurl==7.19.0
-pyephem==3.7.5.1
-pyparsing==1.5.6
-pyth==0.5.6
-python-Levenshtein==0.10.2
-python-dateutil==1.5
-python-gflags==2.0
-python-modargs==1.2
-python-stdnum==0.7
-pytz==2011k
-rdflib==3.1.0
-requests-foauth==0.1.1
-requests==1.0.4
-selenium==2.5.0
-simplejson==2.2.1
-suds==0.4
-tweepy==1.7.1
-tweetstream==1.1.1
-w3lib==1.0
-wsgiref==0.1.2
-xlrd==0.7.1
-xlutils==1.4.1
-xlwt==0.7.2
-xmltodict==0.4
-# Temporarily commenting out ygl because it's gone missing from
-# https://pypi.python.org/pypi/yql/0.7.2
-#yql==0.7.2
-zope.interface==3.8.0
-lxml==2.3.3
-chromium-compact-language-detector==0.031415
-#distribute==0.6.21
-#gensim==0.8.3
-icalendar==3.0.1b1
-#matplotlib==1.0.1
-#pandas==0.4.3
-pyquery==1.0
-#scipy==0.10.0
-scrapely==0.9
-
-# These are ones where the original version wasn't available. So we went to the next
-# nearest available one
-# Changed this from 0.9.3 to 0.9.8
-Fom==0.9.8
-# Changed from 3.09 to 3.10
-PyYAML==3.10
-# Changed from 0.14.0.2841 to 0.14.1
-Scrapy==0.14.1
-# Changed from 15.2.4 to 15.6.2
-adspygoogle.adwords==15.6.2
-# Changed this from 2.0b9 to 3.0.2
-nltk==3.0.2
-# Changed this from 1.0.25 to 1.0.2
-pydot==1.0.2
-# Changed this from 0.21.1 to 0.22.3
-M2Crypto==0.22.3
-
-
-# TODO: Need to install parsley
-#-e git+http://github.com/fizx/pyparsley.git@0eea1362bc38c5e0e3a1caa2358c472c8f6eb3bd#egg=pyparsley-dev
-
-# TODO: Install igraph https://launchpad.net/igraph
-#python-igraph==0.5.3
-
-# TODO: Install R
-# Changed this from 2.2.4dev-20111102 to 2.2.5
-#rpy2==2.2.5