I ma trying to isntall graphtool on centos but I receive an error.

This is what I have tried: 

```
(python_2.7_numerical) [lpuggini@machinelearn-1 ~]$ pip install git+https://github.com/count0/graph-tool
Collecting git+https://github.com/count0/graph-tool
  Cloning https://github.com/count0/graph-tool to /tmp/pip-dU9eDe-build
    Complete output from command python setup.py egg_info:
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
    IOError: [Errno 2] No such file or directory: '/tmp/pip-dU9eDe-build/setup.py'

    ----------------------------------------

```

and 

```
(python_2.7_numerical) [lpuggini@machinelearn-1 ~]$ pip install graphtool
Collecting graphtool
  Using cached graphtool-0.5.2.tar.gz
Collecting CherryPy<=3.1 (from graphtool)
  Using cached CherryPy-3.1.0.tar.gz
Collecting matplotlib<=0.90.1 (from graphtool)
  Using cached matplotlib-0.86.2.tar.gz
    Complete output from command python setup.py egg_info:
    installing data to ./matplotlib/mpl-data
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "/tmp/pip-build-16Qbh5/matplotlib/setup.py", line 201, in <module>
        build_transforms(ext_modules, packages, NUMERIX)
      File "setupext.py", line 760, in build_transforms
        add_numpy_flags(module)
      File "setupext.py", line 119, in add_numpy_flags
        module.include_dirs.append(numpy.get_numpy_include())
    AttributeError: 'module' object has no attribute 'get_numpy_include'

```

I have also tried to install it manually but it is too complicate due to the large number of dependencies