The Mer Wiki now uses your Mer user account and password (create account on https://bugs.merproject.org/)
Mer uses package groups in kickstart files when creating images to define what functionality to provide.
The definition of these groups is in http://gitweb.merproject.org/gitweb?p=mer/project-core.git;a=tree;f=patterns;hb=HEAD
They are added into the repository by the createrelease.sh script.
Mer core contains a minimal set of packages which will allow a Mer system to boot to a multi-user, console level system without basic networking.
The connectivity group adds networking, bluetooth, wireless and telephony.
This group adds fonts and the uxlauncher. It does not provide an X or Wayland server.
For devices that do not have a graphics HA a non-accelerated fb/vesa X server is provided with software rendering for GL.
It is often useful to do basic administration and tests on a device, these packages provide things like an editor, diff, tar, ssh as well as ofono and connman tests.
The debugging group brings in gdb and some other debug symbols