Run on new travis-ci infra

.travis-workarounds.sh

@@ -1,15 +0,0 @@
-#!/bin/bash
-set -e
-set -x
-
-if [[ "${TOXENV}" == "pypy" ]]; then
-    sudo add-apt-repository -y ppa:pypy/ppa
-    sudo apt-get -qy update
-    sudo apt-get install -y pypy pypy-dev
-    # This is required because we need to get rid of the Travis installed PyPy
-    # or it'll take precedence over the PPA installed one.
-    sudo rm -rf /usr/local/pypy/bin
-fi
-
-# Workaround travis-ci/travis-ci#2065
-pip install -U wheel

.travis.yml

@@ -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"