fix bug: depth of resulting tree is less then 2.
fix import in scale_caltech python script
refactor channel builder
fix condition for sample index in assert
fix uninitialized magnitude channel bug
fixes for soft cascade training app
fix typo in integral buffer initialization
remove unused parameter from softcascade::Octave constructor
Merge pull request #608 from cuda-geek:soft-cascade-hot-fixes
Merge pull request #606 from cuda-geek:fix-depth-less-2-bug-in-soft-cascade