Merge pull request #439 from goodfeli/master

improvements to initialization for convolutional models
ignore .inputrc files
Tutorial doc updates
Merge pull request #441 from goodfeli/master

updated link to MLC-2013 solution files (had to move them out of my
Merge pull request #440 from yosinski/master

Minor: ignore .inputrc files
made ZCA more stable
Merge branch 'master' of github.com:lisa-lab/pylearn2