Merge remote-tracking branch 'tymek/post-hook' into develop
Merge remote-tracking branch 'upstream/develop' into develop
[WIP] reports views
Add test report - category->model tree
merge quamilek
added report templates
[WIP] assets reports view
Merge branch '337-report-view' of https://github.com/ar4s/ralph_assets into define-reports
added status-model report
[WIP] assets reports view
Merge remote-tracking branch 'tymek/define-reports' into 337-report-view

Conflicts:
	src/ralph_assets/media/assets/css/style.css
	src/ralph_assets/views/report.py
improvments
added tests
fixed pyflake errors
fixed pyflake errors
refined hostname field (by removing it from unsuitable forms for example)
fixed tests after hostname field cleanup
Update doc
Remove unused images
before review