Documentation about class pd.Series

1. Data structures in the pandas Package overview. “Why more than one data structure (Series vs. DataFrame)?
2. Object creation in 10 minutes to pandas
3. Series in the pandas Intro to data structures
4. Class pd.Series (overview of attributes and methods) in the pandas API reference
5. Class pd.Series in the pandas API reference
6. A pandas Series contains a one-dimensional NumPy ndarray (n-dimensional array) and a pd.Index.