Debian: `imagemagick` preferrable to `libmagickwand-dev` ?

[vsalvino]

Based on my own testing, and looking through the Debian package builds, it seems that installing imagemagick would be much more lean and therefore preferable to installing libmagickwand-dev.

For example, libmagickwand-dev pulls in perl, python, etc. In a docker image, this can severely bloat the image. Another common scenario: if you happen to be using a Python docker image or a custom version of Python, this ends up installing a second unwanted version of Python.

Wanted to check if there was some reasoning for this, before making a pull request to update the docs. Anything I'm missing here?