updated the solve method of DCNonLinEquation

Also corrected Diode's getNonLinContribution method.
Diode element creation method changed
Some Change to diode

getNonLinContribution parameter change to vector f and x
myNewtonRap

a temporary method for calculating newton iteration
getJacobian

Implementation of the getJacobian method for non-linear analysis.
Wrapper update

Added multiple functionalities to the wrappers of JScience components.
Jacobian getter update
clear() method for complex matrix and vector
getJacobian is now getHessian
myNewtonRap update
myNewtonRap update
myNewtonRap

myNewtonRap is now complete, though may be subjected to future change.
Analysis parser test
Parser corrected
Diode contribution taking into account ground nodes
Newton iteration base complete.

-getMag() of IComplex was not working properly
-a test "main" fct in DCNonLinEquation class
myNewtonRap more flexible and portable
Improved myNewtonRap

-added a few matrix/vector operation or functions
New functionalities in IRealMatrix
JScience wrappers with more functionalities.