Bumped packages at requirements.txt
Added blastoff section at main docs page
Show web address after starting server
removed obsolate js
removed unused code
Buildset serialiser should decode bytes
Revert "Buildset serialiser should decode bytes"

This reverts commit c0a0eb6ca91cd6fb8cd10633c696ec756ff8bc18.

The problem was not when serializing data but at the time
it is saved into database so this change is not actually
needed.
Decode bytes when storing buildset errors
Show detailed error at buildset details
show buildset status label only on error