Error when installed on headless systems
Core dump on import:
```bash
hollstei@dep1z2:~$ ipython
Python 3.6.1 |Anaconda custom (64-bit)| (default, May 11 2017, 13:09:58)
Type "copyright", "credits" or "license" for more information.
IPython 5.3.0 -- An enhanced Interactive Python.
? -> Introduction and overview of IPython's features.
%quickref -> Quick reference.
help -> Python's own help system.
object? -> Details about 'object', use 'object??' for extra details.
In [1]: import geoarray
In [2]: QXcbConnection: Could not connect to display
Aborted (core dumped)
hollstei@dep1z2:~$ ;1R
```
What currently helps is this:
```bash
sed -i "/backend : tkagg/c\backend : Agg" $(python -c "import matplotlib; print(matplotlib.matplotlib_fname())")
sed -i "/backend : Qt4Agg/c\backend : Agg" $(python -c "import matplotlib; print(matplotlib.matplotlib_fname())")
sed -i "/backend : qt5agg/c\backend : Agg" $(python -c "import matplotlib; print(matplotlib.matplotlib_fname())")
```
then:
```bash
hollstei@dep1z2:~$ ipython
Python 3.6.1 |Anaconda custom (64-bit)| (default, May 11 2017, 13:09:58)
Type "copyright", "credits" or "license" for more information.
IPython 5.3.0 -- An enhanced Interactive Python.
? -> Introduction and overview of IPython's features.
%quickref -> Quick reference.
help -> Python's own help system.
object? -> Details about 'object', use 'object??' for extra details.
In [1]: import geoarray
In [2]: geoarray
Out[2]: <module 'geoarray' from '/home/hollstei/anaconda3/lib/python3.6/site-packages/geoarray/__init__.py'>
In [3]:
```
but I think it should work by default.
issue