hybrid isampler + autocontext

hybrid_mr_ct_model_zoo.ini

+[config]
+version = 1.0
+
+[data]
+local_id = mr_ct_regression
+url = https://www.dropbox.com/s/lv31fultntgw66t/mr_ct_regression_model_zoo_data.tar.gz?dl=1
+action = expand
+destination = data
+
+[error_maps]
+local_id = isampler_autocontext_mr_ct
+url = https://www.dropbox.com/s/xx5ahj4m12bf67h/autocontext_mr_ct_initial_maps.tar.gz?dl=1
+action = expand
+destination = models
+
+[code]
+local_id = isampler_autocontext_mr_ct
+url = https://www.dropbox.com/s/mq4pgey1zfeai24/isampler_autocontext_mr_ct_model_zoo_config.tar.gz?dl=1
+action = expand
+destination = extensions

hybrid_mr_ct_model_zoo.md

+```bash
+python net_run.py train \
+    -a niftynet.contrib.regression_weighted_sampler.isample_regression.ISampleRegression \
+    -c /home/wenqi/niftynet/extensions/isampler_autocontext_mr_ct/net_hybrid.ini \
+    --starting_iter 0 --max_iter 500
+for max_iter in `seq 1000 1000 10000`
+do
+    python net_run.py inference \
+        -a niftynet.contrib.regression_weighted_sampler.isample_regression.ISampleRegression \
+        -c ~/niftynet/extensions/isampler_autocontext_mr_ct/net_hybrid.ini \
+        --inference_iter -1 --spatial_window_size 240,240,1 --batch_size 4 --dataset_split_file nofile
+
+    python net_run.py inference \
+        -a niftynet.contrib.regression_weighted_sampler.isample_regression.ISampleRegression \
+        -c ~/niftynet/extensions/isampler_autocontext_mr_ct/net_hybrid.ini \
+        --inference_iter -1 --spatial_window_size 240,240,1 --batch_size 4 \
+        --dataset_split_file nofile  --error_map True
+
+    python net_run.py train \
+        -a niftynet.contrib.regression_weighted_sampler.isample_regression.ISampleRegression \
+        -c ~/niftynet/extensions/isampler_autocontext_mr_ct/net_hybrid.ini \
+        --starting_iter -1 --max_iter $max_iter
+done
+```