namespaces: "nta" replaced by "nupic"
Remaining code
folder: "nta" replaced to "nupic"
src/nta renamed to src/nupic
Fixed problem with OSX build
Include correct mangled name following namespace change
Merge pull request #2 from oxtopus/namespace_nupic

Include correct mangled name following namespace change
Merge pull request #243 from DavidRagazzi/namespace_nupic

"nta" replaced by "nupic" (namespace and folder)