redoing old pull request. Closes #544 closes #513
#572
Merge pull request #582 from OCHA-DAP/marianne-dev

Merged! A nicer, neater pull request :) Closes #544 closes #513
Merge pull request #583 from OCHA-DAP/dev-clean-template-files

Dev clean template files
Merge pull request #584 from OCHA-DAP/arti-layout-changes

Arti layout changes
#571 - create css file for the dataset page
sources.txt update
Merge branch 'dev' into arti-layout-changes
#571 - some common css