Remove forever also from here, eventually using upstart
Upsert syntax change

When changed the db driver update function changed to take upsert as
part of options object.
Fix Bugzilla export to work with Ruby 1.9.3

Will be rewritten with node anyways but nicer to start when existing
method can be run.
Added API endpoint for getting latest bug change date

Fetch the start time for fetching bugs from QA Dashboard. QA Reports
exporter uses the same thing.
New Bugzilla Export written for node

Having one Ruby tool in a node project just makes it more complicated
for users to set up their environment. Replace with a node
implementation.

This includes also minor changes to previous functionality:
* Dates from Bugzilla are expected to be in UTC timezone. Previously it
  was not specified so they were handled as if they were in the same
  timezone as the machine running Bugzilla export
* Week number is calculated in American weeks, i.e. week with Jan 1st
  is week number 1.