BLD: numpy 1.7.0 is on pypi, no need to get it from GH anymore

Author: y-p

ci/install.sh

@@ -19,9 +19,9 @@ pip install $PIP_ARGS --use-mirrors cython nose python-dateutil pytz
 if [ ${TRAVIS_PYTHON_VERSION} == "3.2" ]; then
     sudo apt-get $APT_ARGS install python3-numpy;
 elif [ ${TRAVIS_PYTHON_VERSION} == "3.3" ] || [  x"$LOCALE_OVERRIDE" != x""  ]; then # should be >=3,3
-    pip $PIP_ARGS install https://github.com/numpy/numpy/archive/v1.7.0.tar.gz;
+    pip $PIP_ARGS install numpy==1.7.0;
 else
-     pip install numpy==1.6.1
+    pip $PIP_ARGS install numpy==1.6.1;
 fi
 
 # Optional Deps