multi class neural network
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