IRAF tasks of interest to be replaced

*This was originally sent to STScI as a help call (INC0131510).*

I list below the IRAF tasks that I would most like to see 'carbon copy' replacements for in Python.

1. `splot`
2. `ccdproc` - especially interactive bias overscan fitting and trimming
3. `longslit.identify`, `reidentify`, `fitcoords`, `transform`, `standard`, `sensfunc`
4. `imcopy` with the ability to select image sections and extensions
5. `implot`

cc @crawfordsm

p.s. Feel free to crossref with other issues as appropriate.