Run on new travis-ci infra

Author: dangra

.travis-workarounds.sh

@@ -1,5 +1,6 @@
 language: python
 python: 2.7
+sudo: false
 branches:
   only:
     - master
@@ -10,7 +11,6 @@ env:
 - TOXENV=py33
 - TOXENV=docs
 install:
-- "./.travis-workarounds.sh"
 - pip install -U tox twine wheel
 script: tox
 notifications:
@@ -19,6 +19,9 @@ notifications:
     skip_join: true
     channels:
     - irc.freenode.org#scrapy
+cache:
+  directories:
+    - $HOME/.cache/pip
 deploy:
   provider: pypi
   distributions: "sdist bdist_wheel"