kernel refactoring
samples and kernel functions
update extras
add custom kernel
Merge branch 'master_before_312' into kernel_tmp
merge F# wrapper and demos to kernel branch
cleanup code: remove dead code after refactoring
Merge branch 'master' into kernel_tmp

Conflicts:
	LibSvm/Svm.cs
Merge branch 'master' into kernel_tmp
Merge branch 'master' into kernel_tmp

Conflicts:
	LibSvm/KernelType.cs
	LibSvm/Svm.cs
	LibSvm/SvmModel.cs
	LibSvm/SvmNode.cs
	LibSvm/SvmParameter.cs
	LibSvmExtras/SVM.cs
	LibSvmExtras/Svm/SvmBase.cs
	LibSvmFs/SVMFS.fs
	LibSvmFsDemo/CSvc.fs
	LibSvmFsDemo/EpsSvr.fs
	LibSvmFsDemo/NuSvc.fs
	LibSvmFsDemo/NuSvr.fs
	LibSvmFsDemo/OneClass.fs
code cleanup: replace tabs with spaces
code cleanup: remove unused usings
minor refactorings; typo fixes
refactor variable usages
minor refactorings
code cleanup