multiclass classification by neural network, not finished
multi class neural network
minor change
add clone and toString func for sample.
BP algorithm tuning
solve confilct
fix mixture of tabs and spaces
fix mixture of tabs and spaces
support profiling in mc-run
reduce one map access in SetValue
adjust neural network - increase performance, add hidden layer offset, add verbose opt, add learning rate discount
debug neural network
Merge branch 'master' of https://github.com/lihang00/hector into lihang00-master
Merge branch 'neural-network' into develop

Conflicts:
	neural_network.go
remove debug info
Issue: write the code of lbfgs

issue: fix compile mistakes
Merge branch 'develop'
fix multiclass ann - we missed one class
hot fix vector for building failure...
fix test function compile error.