Functions that solve boundary value problems ('BVP') of systems of ordinary
differential equations ('ODE') and differential algebraic equations ('DAE').
The functions provide an interface to the FORTRAN functions
'twpbvpC', 'colnew/colsys', and an R-implementation of the shooting method.
Mazzia, F., J.R. Cash and K. Soetaert (2014),
"Solving Boundary Value Problems in the Open Source Software R:
Package bvpSolve"