Gazebo on Gentoo

[jrivero]

@gbiggs

So it should be called “gazebo”, there should be versions available for 7 and 8 (and minor/patch releases as appropriate)

Agree. +1 for using the slots.

@gbiggs

it should be slotted so that a user can have one version 7 and one version 8 installed simultaneously.

This would require patching since upstream does not implement the option of having two versions installed at the same time and some files are going to use the same names.