[1625] Report of datasets with the apps which use them
[1625] Group datasets by theme
Moves package edit to jinja but requires extra helpers
Move package_read and associated helpers to jinja
[noticket] Analytics load - better error message.
Fix call to unknown helper in timeseries
Adds some space to the extras tab
Fix how we display errors with a macro
Fix the breadcrumb in edit
Fix display of time series
Fix display of timeseries e.g. /dataset/dft-eng-srn-routes-journey-times
Changes to commitment, api and cache_header templates
Remove unnecessary debug
Merge pull request #74 from datagovuk/jinja-migration

[WIP] Jinja migration
Spending templates
Linked data page
Openspending report index
Sysadmin screen in Jinja
Initial jinja for the feedback templates, rest pending #70
Most of inventory templates that do not depend on #70