updates readme with eigency

README.md

@@ -5,14 +5,18 @@
 
 # Few
 
-**Few** is a **Feature Engineering Wrapper** for sci-kitlearn. Few looks for a set of feature transformations that work best with a specified machine learning algorithm in order to improve model estimation and prediction. In doing so, FEW is able to provide the user with a set of concise, engineered features that describe their data.
+**Few** is a **Feature Engineering Wrapper** for sci-kitlearn. Few looks for a set of feature transformations that work best with a specified machine learning algorithm in order to improve model estimation and prediction. In doing so, Few is able to provide the user with a set of concise, engineered features that describe their data.
 
 Few uses genetic programming to generate, search and update engineered features. It incorporates feedback from the ML process to select important features, while also scoring them internally. 
 
 
 ## Install
 
-You can use pip to install FEW from [PyPi](https://pypi.python.org/pypi/FEW) as: 
+Version 0.0.30 introduced c++ optimizations that depend on [eigency](https://github.com/wouterbroomsma/eigency). Install eigency as:
+
+```pip install eigency```
+
+Then you can use pip to install FEW from [PyPi](https://pypi.python.org/pypi/FEW) as: 
 
 ```pip install few```