hackishly fixed silly url error
add placeholder example to the publication date
Map page: Date Range --> Publication Date Range;  Home page: DATA WATCH --> DATA UPDATES
bug fix exception generated when 0 search result
add hyperlink on the search result. by doing so, we could access the dataset details directly
on central, only user having 'admin' role could see the contribute tab
added content model keywords CSV
Merge branch 'master' of https://github.com/ngds/ckanext-ngds
fixing some merge conflicts