remove unused javascript files
add basic treemap
add jasmine tests for treemap
retrieve colours from table metadata
add styling to treemap nodes
display amount in treemap nodes
make 'others' grouping optional
define treemap size using CSS
add basic tooltip, tests missing
Merge branch 'master' into treemap

* master: (27 commits)
  Override location of credential files using env
  Script fails at first error
  Cleanup out folder before building new artefact
  Remove build number from artefact name.
  Fix tar command to zip rather than unzip
  Rename aboutData to about-data
  Use tar to build artefact rather than zip
  Create data directory if it does not exist
  Extract module for template rendering
  Add build timestamp to artifact
  Parametrize fetching with secrets and oauth token
  Serve up local assets with correct content types
  Update with fetch parameters
  Parametrize google secret and token locations
  Test for parsing argument parameters
  Parse arguments, but provide default values
  Failing test default arguments
  use EXPLORER_HOST variable for base url
  Add header, footer to home page, fix nav links
  Generate homepage headlines from data
  ...

Conflicts:
	create_pages.py
no tooltip if we don’t have the info for it, fades on hover, new ‘parent’ node class
just use fonts, not the versioned, er, version
add key to tooltip replacement and tip and a parent node that can be disregarded
ignore maxdx and dy for now
Merge branch 'all_services_pages' into treemap

* all_services_pages: (40 commits)
  Fix broken links in Home
  Add link to download data as CSV
  Add default sort order and title to header
  Sort all services table
  Generate all combinations of sorting for all services
  Sort all services by department and takeup
  Feature tests for sorting all service tables
  Add data attributes to department rows
  Add department link
  Split department test into different classes
  Only render the csv once! :)
  Display data coverage for all services
  Dept cost calculation  uses same quarter for cost and volume
  Remove unused digital_volume from Department
  Takeup use the same quarter for volume and dig volume
  breaking test to guide aggregating for single quarter
  Aggregate kpis over multiple attributes
  No takeup when no volume, use high volume only
  Include csv download link on about-data and high vol. pages
  Change services number in test
  ...
remove opacity transition to avoid transition text bounce :disappointed:
change to blocks, add in the concept of a xx-large node
add in js
more reshuffling of files - more sane now?
change grouping to use sum of values, not max val. Also... XXL