Added basic implementation of variadic args
Added basic implementation of variadic args
Fix for FFT
Reenabled a test and add a get_data function
Moved fully to template metaprogramming for args
Use a smaller metaprogram to get the last type from a pack

Was running into compiler errors in MSVC 2013 when using
at<sizeof...(T)-1, type_sequence<T...>>::type, but this smaller
construct works fine.
Merge pull request #220 from mwiebe/args

Irwin's args PR + a windows fix