cite about-plugin metadata. This could be retrieved later, say by an
install script or other helper function, with:
cat ~/.bash_it/plugins/enabled/base.plugin.bash | metafor about-plugin
In this way, summaries of each plugin may be provided to give newcomers
(like me!) an overview.
also, rewrote plugins-help(), which didn't work very well on my system.
It now dynamically queries composure metadata.