* stash

* pidparams suggestion

* pid creation update (ss) and s2f and f2s

* ss default, new filter

* remove paralleltime, inf->Inf

* update some tests

* single conversion method with param detection

* update errors

* Handle special cases

* Update error capitalization

* remove gof usage

* fix pidplots

* Fix pid creation, update stabregionpid

* Fix test

* Update docs

* Fix test pid in tf form

* Improve error for pid ss with D-part

* Update src/pid_design.jl

Co-authored-by: olof3 <olof3@users.noreply.github.com>

* stash

* new interface suggestion

* revert some code and make stuff work

* Ts=0 to Ts=nothing

* change parameter names when standard form

* kp/ki/kd -> param_p/param_i/param_d

* fix functions missing form

* fix tests

* fix errors to pass tests

* more tests

* Ts nothing

* make leadlinkcurve recipe and doplot on stabreg

* fix some docs

Co-authored-by: olof3 <olof3@users.noreply.github.com>
Co-authored-by: Fredrik Bagge Carlson <baggepinnen@gmail.com>