Update repository URLs (#212)

matpltolib.rb, numpy.rb and pandas.rb are also transferred to Red Data
Tools.

Author: kou

README.md

@@ -131,15 +131,15 @@ DEBUG(find_libpython) dlopen("/opt/brew/opt/python/Frameworks/Python.framework/V
 
 ### matplotlib
 
-Use [mrkn/matplotlib.rb](https://github.com/mrkn/matplotlib.rb) instead of just importing it by `PyCall.import_module("matplotlib")`.
+Use [red-data-tools/matplotlib.rb](https://github.com/red-data-tools/matplotlib.rb) instead of just importing it by `PyCall.import_module("matplotlib")`.
 
 ### numpy
 
-Use [mrkn/numpy.rb](https://github.com/mrkn/numpy.rb) instead of just importing it by `PyCall.import_module("numpy")`.
+Use [red-data-tools/numpy.rb](https://github.com/red-data-tools/numpy.rb) instead of just importing it by `PyCall.import_module("numpy")`.
 
 ### pandas
 
-Use [mrkn/pandas.rb](https://github.com/mrkn/pandas.rb) instead of just importing it by `PyCall.import_module("pandas")`.
+Use [red-data-tools/pandas.rb](https://github.com/red-data-tools/pandas.rb) instead of just importing it by `PyCall.import_module("pandas")`.
 
 ## PyCall object system
 

docker/Dockerfile

@@ -183,7 +183,7 @@ RUN bundle exec iruby register
 
 # Deploy matplotlib's examples
 RUN mkdir -p /tmp \
-	&& curl -fsSL https://github.com/mrkn/matplotlib.rb/archive/master.tar.gz | tar -xzf - -C /tmp \
+	&& curl -fsSL https://github.com/red-data-tools/matplotlib.rb/archive/master.tar.gz | tar -xzf - -C /tmp \
 	&& mv /tmp/matplotlib.rb-master/examples /notebooks/examples/matplotlib \
         && rm -rf /tmp/matplotlib.rb-master