Fix vector-interpolation variationConfigWrtParam
Fix bug in vector-interpolation
cubic-b-spline.cc: fix indent when printing.
Add some extra cubic B-spline methods.

Also modify some of the existing Polynomial methods.
[travis][cmake] Synchronize.
polynomial-3: add real root finder.
Fix Eigen/Roboptim dependencies.
Merge awernerdlr's template polynomials.
polynomial.cc: fix style.
polynomial.hh: fix style and missing doc.
polynomial.hxx: fix style.
polynomial: fix compilation.
polynomial: fix test.
polynomial.cc: add missing implementation.
polynomial: add real root finder.
polynomial: fix operators.
Merge pull request #11 from bchretien/polynomials

Add template polynomials
polynomial: allow conversion of polynomials of different orders.
polynomial: implement full-precision multiplication.
polynomial: remove dead code in derivative test.