Version 2.0.0

Object-based operator has been fully redesigned in order to reduce verbosity and increase funcionality.
Allowed to use a set of folders or files as input for pre-processing.
Configuration options handler have been remodeled.
Improved the extractor registration process.
Added new functionality to dynamically create pipelines.
Some functions and classes have been renamed to increase readability.

Version 1.0.1

Improvements on the structure of the tests. Now taken into account the suggested packages
Fixed issues caused by archiving the rtweet package