removed pycairo dependency

README.md

@@ -10,6 +10,8 @@ Use the package manager [pip](https://pip.pypa.io/en/stable/) to install `causal
 pip install causaleffect
 ```
 
+If one wants to plot graphs with the `plotGraph` function, either the `pycairo` library (version `1.17.2` or later) or the `cairocffi` library is also required.
+
 ## Usage
 
 If we want to compute the causal effect P(y|do(X=x)) from the causal diagram shown below,

requirements.txt

@@ -1,3 +1,2 @@
-pycairo>=1.17.2
 numpy>=1.15.1
 python-igraph>=0.8.3

setup.py

@@ -1,6 +1,6 @@
 from setuptools import setup
 
-version = '0.0.1'
+version = '0.0.2'
 description = 'Computing causal effects'
 long_description = """
 # causaleffect