DOC: link to install instructions in README.md
_edit: the install instructions in the github README.md are out of date. They should link to the install instructions on the website_

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I'm not sure what the expectation is here, but it seems to me that something's not right...  The [installation instructions](https://github.com/pydata/pandas/#where-to-get-it) say that `easy_install` has access to binary packages.  However, `easy_install` fails if the appropriate compiler is not available.  Would it be possible to either clarify the instructions to explain that binary packages are not available via `easy_install`, or fix the package to work without a compiler?
#### Code Sample, a copy-pastable example if possible

```
C:\> easy_install.exe pandas
```
#### Expected Output

Pandas should be successfully installed
#### Actual Output

`error: Setup script exited with error: Microsoft Visual C++ 9.0 is required (Unable to require vcvarsall.bat).  Get it from http://aka.ms/vcpython27`
#### output of `pd.show_versions()`

`easy_install` is trying to install `pandas-0.18.1`.
However, it is not succeeding.  As a result, `import pandas as pd` throws `ImportError` and I cannot run this command.
