Peer review metrics: create a new page for pyos packages

[lwasser]

We currently have a peer-review-status page that summarizes the stats of active reviews.

We now need a new dashboard that helps us track package activity. Let's make a new section called pyos-packages.
And start a new page that begins to pull in package metrics.

1. pull in data from this file which collects pacakge information using pyosmeta where possible (see example here)
2. for each package create a dataframe row containing the package's name, description and github metrics stored in that file associated with that package.
3. Then create a table that allows us to sort packages by last commit date.
4. finally create a second table that shows only packages that haven't been updated (no commits) in the last 6 months.

[lwasser]

This is the beginning of another set of tasks related to tracking and plotting package metrics!