add popup to map for projects

link in popup to project detail page
new route for 'slug' (SAPNO)
Merge pull request #57 from milafrerichs/map

add popup to map for projects
add elasticsearch and haystack
Merge pull request #58 from milafrerichs/search

add elasticsearch and haystack
added submit button on header

only submit via ajax on filter page
Merge pull request #59 from milafrerichs/search

added submit button on header
search now works with projects
add search fields to index
Merge pull request #60 from milafrerichs/search

Search for projects