remove numpy install from travis/tox scripts

travis builds could fail due to timeout building numpy

.travis.yml

@@ -1,14 +1,13 b''
 # http://travis-ci.org/#!/ipython/ipython
 language: python
 python:
     - 2.6
     - 2.7
     - 3.2
 before_install:
-    - pip install --use-mirrors numpy
     - easy_install -q pyzmq
 install:
     - python setup.py install -q 
 script:
     - if [[ $TRAVIS_PYTHON_VERSION == '2.'* ]]; then iptest -w /tmp; fi
     - if [[ $TRAVIS_PYTHON_VERSION == '3.'* ]]; then iptest3 -w /tmp; fi

tox.ini

@@ -1,19 +1,19 b''
 # Tox (http://tox.testrun.org/) is a tool for running tests
 # in multiple virtualenvs. This configuration file will run the
 # test suite on all supported python versions. To use it, "pip install tox"
 # and then run "tox" from this directory.
 
 [tox]
 envlist = py26, py27, py32
 
 [testenv]
 commands =
-    pip install -q --use-mirrors numpy nose
+    pip install -q --use-mirrors nose
     easy_install -q pyzmq
     iptest -w /tmp
 
 [testenv:py32]
 commands =
-    pip install -q --use-mirrors numpy nose
+    pip install -q --use-mirrors nose
     easy_install -q pyzmq
     iptest3 -w /tmp