Added LuaTable class. first draft
Updated LuaTable
Making work the new LuaTable class, which allow to use Lua tables from C++, reducing the overhead of creating new C++ hash tables
Updated, solved problems in ZCA and PCA whitening components
Added util.clone function
Solved problem in util.clone and clone_function with _ENV variable
Minor modification of LuaTable
Making transparent the use of tokens/matrix from Lua side
Solving memory leak problems and updating dataset.token to accept matrices as tokens in putPattern methods
Updating dataset.token iterate method
Merge pull request #110 from pakozm/LuaTable

Lua table implementation