Base filter class almost complete

There appears to be an EigenBase/MatrixBase/ArrayBase template reference
to limit/accommodate Matrix and Vector classes - which will be in the
next update, this update was suppose to have a test using OTSDF, but MS
visual studio doesn't seem to be generating a .lib file even though i
included a macro for "__declspec(dllexport)" to use on each of the
classes being exported...