Remove conda environements file and add requirements file for pip, adapt README

README.md

@@ -179,9 +179,9 @@ pandas, numpy, nested_dict, matplotlib (2.1.2), scipy, NEST 2.14.0
 
 Optional: seaborn, Sumatra
 
-To install the required packages in a conda environment, execute:
+To install the required packages with pip, execute:
 
-`conda env create -f environment.yaml`
+`pip install -r requirements.txt`
 
 Note that NEST needs to be installed separately, see <http://www.nest-simulator.org/installation/>.
 

environment.yaml

-name: multiarea_model
-dependencies:
- - future
- - numpy
- - matplotlib
- - pandas
- - python==3.6
- - scipy
- - pip:
-   - nested_dict
-   - dicthash

requirements.txt

+future
+numpy
+matplotlib
+pandas
+scipy
+nested_dict
+dicthash