Fix a pyflakes complaint.
Add kernel stride support, rename subsample.
fix image viewer

replaced os.popen by subprocess.Popen; platform specific commands
Merge pull request #279 from bbudescu/img_view_subprocess

fix image viewer
pep8
Merge pull request #271 from dwf/maxout_stride

Strides for maxout convolutional models
Make maxout test work when device=cpu when cuda is available.
Patch old pickle files that don't have kernel_stride.
Merge pull request #284 from dwf/kernel_stride_patch

Patch old pickle files that don't have kernel_stride.
fix small error detected by pyflakes.
Merge pull request #282 from nouiz/gpu_test

Gpu test
Merge remote-tracking branch 'upstream/master'