Added show_iter output
add minfinder.jl to Optim.jl
Added Points type and simplified function. Still needs debugging.
removed unused import Base.assign and Base.ref to remove warnings
Added documentation to README;
Use Vector{SearchPoint} instead of Points type;
Succesful debugged;
Use `dot` for grad-criteria;
Use copy to store g
Adjust for multiple fvals output of fminbox;
Convert Int inputs to Float64;
Added MultipleMinimaProblems;
TODO add tests and parallel processing