New bulktracker release

[Benny Siegert <bsiegert%gmail.com@localhost>]

Hi!

I just updated https://releng.netbsd.org/bulktracker/ to a new release.

Here is the changelog:


- Piecharts are now generated with the bundled ChartJS instead of Google 
Charts
- Store and show errors when fetching details, providing a reason why 
there are no details for a certain build (#5)
- update README
- code cleanups

The second point means that for all new builds from today on, if there 
is an error fetching or parsing the package-level details, that error is 
shown on the bulk summary page. Hopefully, that will make it more 
transparent why there's no detailed data.

--
Benny