autojump-share is a new script that gives you the path to autojump's
shared directory. It can then be used in the various shell's rc files to
find and source the autojump integration. Eg:
source "$(autojump-share)/autojump.bash"
Fixes#3239
There are many more packages to fix, this is just a start.
Rules:
* Don't repeat the package name (not always that easy...)
* Start with capital letter
* Don't end with full stop
* Don't start with "The ..." or "A ..."
I've also added descriptions to some packages and rewritten others.
