Ignore sublime project files
Initial file structure for tuple
Implemented invoke(f, args...)

This function calls f with the arguments args and returns the result (if
there is one)
Refactored implementation of helpers to the bottom of the file.
Added some docs about invoke
Simplified code of invoke_helper's
Corrected some typos in docs.
Added some carifying comments to the invoke_helpers.
Renamed to invoke.cpp since it will only contain unit tests forinvoke()
Added another section comment to the unit tests

This is in preparation for another set of unit tests.
Fixed bug where invoke could not be called with an Lvalue tuple of
arguments
Added stubs for make()
Added implementation of make<T>()
Use DataObjects instead of the custom TestObject