udpated docs: add psutil to simple install anaconda instructions

docs/install-anaconda.md

@@ -8,7 +8,7 @@
 conda update --all
 conda create -n wetb_py3 python=3.5
 source activate wetb_py3
-conda install setuptools_scm future h5py pytables pytest nose sphinx blosc
+conda install setuptools_scm future h5py pytables pytest nose sphinx blosc psutil
 conda install scipy pandas matplotlib cython xlrd coverage xlwt openpyxl paramiko
 conda install -c https://conda.anaconda.org/conda-forge pyscaffold pytest-cov
 ```
@@ -19,7 +19,7 @@ conda install -c https://conda.anaconda.org/conda-forge pyscaffold pytest-cov
 conda update --all
 conda create -n wetb_py3 python=3.4
 source activate wetb_py3
-conda install setuptools_scm future h5py pytables pytest nose sphinx
+conda install setuptools_scm future h5py pytables pytest nose sphinx psutil
 conda install scipy pandas matplotlib cython xlrd coverage xlwt openpyxl paramiko
 conda install -c https://conda.anaconda.org/conda-forge pyscaffold pytest-cov
 ```