that is one of the more subtle differences between the old and the
new parsers. now, valgrind does not seem to complain anymore, so everything
should be All Right (TM) ;)
After transitioning to use the new parser, the SinglePvtDead class was never
used even when the 'samples' argument used to control usage was zero or negative.
The resulting construction of SinglePvtDeadSpline objects was then failing.
This change adds a new constructor to SinglePvtDead, and restores the ability
to control spline usage with the samples argument.
The functions of linInt.hpp are now used everywhere, but:
- linInt.hpp -> linearInterpolation.hpp (better name)
- linearInterpolationExtrap() -> linearInterpolation() (extrapolate by default)
