add warning about schema deletion next to Remove button on resource_edit page
rename "Download" to "Download Data Package"
add auth check for edit schema button
Merge branch 'master' of github.com:ckan/ckanext-b2 into metadata-editor

Conflicts:
	ckanext/datapackager/fanstatic/datapackager.css
	ckanext/datapackager/templates/datapackager_ckan_theme/package/resource_read.html
Remove schema overwriting warning

Can't get it positioned properly, put it back later