Corrected some comments in cos.hh
Added a polynomial function class
Added a test for the polynomial function. Work in progress.
Implemented some tests for polynomial functions
Added the documentation for polynomial functions
Fixed the doxygen comments
Removed the warnings
Finished the polynomial class with Horner's method
Added Stanislas Brossette as an author of this package
Merge pull request #34 from stanislas-brossette/master

Added a polynomial function class.