Add LD_PRELOAD to the dockerfile

Cleanup the readme a little

Author: manthey

Dockerfile

@@ -90,6 +90,7 @@ RUN python -m slicer_cli_web.cli_list_entrypoint ColorDeconvolution --help
 # Debug import time
 RUN python -X importtime ColorDeconvolution/ColorDeconvolution.py --help
 
-ENV PYTHONUNBUFFERED=TRUE
+ENV PYTHONUNBUFFERED=TRUE \
+    LD_PRELOAD=/lib/x86_64-linux-gnu/libstdc++.so.6
 
 ENTRYPOINT ["/bin/bash", "docker-entrypoint.sh"]

README.rst

@@ -40,8 +40,7 @@ HistomicsTK can be used in two ways:
 
   $ git clone https://github.com/DigitalSlideArchive/HistomicsTK/
   $ cd HistomicsTK/
-  $ python -m pip install setuptools-scm "Cython>=0.25.2" "scikit-build>=0.8.1" "cmake>=0.6.0" "numpy>=1.12.1"
-  $ python -m pip install -e .
+  $ python -m pip install -e . --find-links https://girder.github.io/large_image_wheels
 
   HistomicsTK uses the `large_image`_ library to read content from whole-slide and microscopy image formats. Depending on your exact system, installing the necessary libraries to support these formats can be complex.  There are some non-official prebuilt libraries available for Linux that can be included as part of the installation by specifying ``pip install histomicstk --find-links https://girder.github.io/large_image_wheels``. Note that if you previously installed HistomicsTK or large_image without these, you may need to add ``--force-reinstall --no-cache-dir`` to the ``pip install`` command to force it to use the find-links option.