Merge pull request #147 from jkreft-usgs/master

preview publications
Merge pull request #148 from jkreft-usgs/master

Requirements.txt
Merge pull request #149 from jkreft-usgs/master

map fiddling
Added date form field for searching past publications in new_pubs
resolved some pull clashes
cleaned up import statements
Merge pull request #151 from jkreft-usgs/master

opensearch
Merge pull request #150 from skochaver-USGS/master

New Pubs search by date
Merge pull request #152 from jkreft-usgs/master

beautiful soup acts different with and without lxml
readme, put url_for in newpubs