title: matplotlib 1.3.1 has requirement numpy>=1.5, but you'll have numpy 1.8.0rc1 which is incompatible
body: <p>I'm executing bellow command in Mac (High Sierra) as a part of getting started with <a href="https://github.com/tyiannak/pyAudioAnalysis" rel="noreferrer" title="pyAudioAnalysis">pyAudioAnalysis</a>.</p>
  
  <pre><code>pip install numpy matplotlib scipy sklearn hmmlearn simplejson eyed3 pydub  
  </code></pre>
  
  <p>I'm getting following error during the installation process. Appreciate your input. </p>
  
  <p><strong>matplotlib 1.3.1 has requirement numpy>=1.5, but you'll have numpy 1.8.0rc1 which is incompatible.</strong></p>
  
  <p>Please find more information below, </p>
  
  <pre><code>Channas-MacBook-Pro:~ channa$ python
  Python 2.7.10 (default, Oct  6 2017, 22:29:07) 
  [GCC 4.2.1 Compatible Apple LLVM 9.0.0 (clang-900.0.31)] on darwin
  Type "help", "copyright", "credits" or "license" for more information.
  &gt;&gt;&gt; 
  [3]+  Stopped                 python
  Channas-MacBook-Pro:~ channa$ pip -V
  pip 10.0.0b2 from /Library/Python/2.7/site-packages/pip-10.0.0b2-py2.7.egg/pip (python 2.7)
  Channas-MacBook-Pro:~ channa$ sudo pip install numpy matplotlib scipy sklearn hmmlearn simplejson eyed3 pydub
  The directory '/Users/channa/Library/Caches/pip/http' or its parent directory is not owned by the current user and the cache has been disabled. Please check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
  The directory '/Users/channa/Library/Caches/pip' or its parent directory is not owned by the current user and caching wheels has been disabled. check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
  Requirement already satisfied: numpy in /System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python (1.8.0rc1)
  Requirement already satisfied: matplotlib in /System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python (1.3.1)
  Requirement already satisfied: scipy in /System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python (0.13.0b1)
  Collecting sklearn
    Downloading sklearn-0.0.tar.gz
  Collecting hmmlearn
    Downloading hmmlearn-0.2.0-cp27-cp27m-macosx_10_6_intel.macosx_10_9_intel.macosx_10_9_x86_64.macosx_10_10_intel.macosx_10_10_x86_64.whl (183kB)
      100% |████████████████████████████████| 184kB 189kB/s 
  Collecting simplejson
    Downloading simplejson-3.13.2.tar.gz (79kB)
      100% |████████████████████████████████| 81kB 256kB/s 
  Collecting eyed3
    Downloading eyeD3-0.8.5-py2.py3-none-any.whl (167kB)
      100% |████████████████████████████████| 174kB 100kB/s 
  Collecting pydub
    Downloading pydub-0.21.0-py2.py3-none-any.whl
  Requirement already satisfied: python-dateutil in /System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python (from matplotlib) (1.5)
  Collecting tornado (from matplotlib)
    Downloading tornado-5.0.1.tar.gz (504kB)
      100% |████████████████████████████████| 512kB 354kB/s 
  Requirement already satisfied: pyparsing&gt;=1.5.6 in /System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python (from matplotlib) (2.0.1)
  Collecting nose (from matplotlib)
    Downloading nose-1.3.7-py2-none-any.whl (154kB)
      100% |████████████████████████████████| 163kB 213kB/s 
  Collecting scikit-learn (from sklearn)
    Downloading scikit_learn-0.19.1-cp27-cp27m-macosx_10_6_intel.macosx_10_9_intel.macosx_10_9_x86_64.macosx_10_10_intel.macosx_10_10_x86_64.whl (8.0MB)
      100% |████████████████████████████████| 8.0MB 259kB/s 
  Collecting python-magic (from eyed3)
    Downloading python_magic-0.4.15-py2.py3-none-any.whl
  Collecting pathlib (from eyed3)
    Downloading pathlib-1.0.1.tar.gz (49kB)
      100% |████████████████████████████████| 51kB 54kB/s 
  Requirement already satisfied: six in /System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python (from eyed3) (1.4.1)
  Collecting futures (from tornado-&gt;matplotlib)
    Downloading futures-3.2.0-py2-none-any.whl
  Collecting singledispatch (from tornado-&gt;matplotlib)
    Downloading singledispatch-3.4.0.3-py2.py3-none-any.whl
  Collecting backports_abc&gt;=0.4 (from tornado-&gt;matplotlib)
    Downloading backports_abc-0.5-py2.py3-none-any.whl
  matplotlib 1.3.1 has requirement numpy&gt;=1.5, but you'll have numpy 1.8.0rc1 which is incompatible.
  Installing collected packages: scikit-learn, sklearn, hmmlearn, simplejson, python-magic, pathlib, eyed3, pydub, futures, singledispatch, backports-abc, tornado, nose
    Running setup.py install for sklearn ... done
    Running setup.py install for simplejson ... done
    Running setup.py install for pathlib ... done
    Running setup.py install for tornado ... done
  Consider using the `--user` option or check the permissions
  </code></pre>