DOC: reorganisation of the documentation?
I think the documentation can use some reorganisation.

The current structure looks like this (updated with status of jan 2017):

```
    What’s New
    Installation
    Contributing to pandas
    Frequently Asked Questions (FAQ)
    Package overview
    10 Minutes to pandas
    Tutorials
    Cookbook
    Intro to Data Structures
    Essential Basic Functionality
    Working with Text Data
    Options and Settings
    Indexing and Selecting Data
    MultiIndex / Advanced Indexing
    Computational tools
    Working with missing data
    Group By: split-apply-combine
    Merge, join, and concatenate
    Reshaping and Pivot Tables
    Time Series / Date functionality
    Time Deltas
    Categorical Data
    Visualization
    Style
    IO Tools (Text, CSV, HDF5, ...)
    Remote Data Access
    Enhancing Performance
    Sparse data structures
    Caveats and Gotchas
    rpy2 / R interface
    pandas Ecosystem
    Comparison with R / R libraries
    Comparison with SQL
    Comparison with SAS
    API Reference
    Internals
    Release Notes
```

which is a huge list that is somewhat unclear and difficult to navigate. 
It is maybe also an issue that will have to go hand in hand with a better navigation provided in the html theme of the docs.
