upgrade some dependencies
remove 'postgis' from 'schema_search_path'

- activerecord-postgis-adapter 2.1.0 creates extensions in the public schema
migrate postgis to public schema
Merge pull request #41 from it3s/upgrade

upgrade some dependencies
add contributing model
move 'maps_count' to 'Contributor' concern
strip tags from list items
add specs to contributing
add new layouts and create contributors controller
display lists correctly inside modal dialog
refactoring
fix geo_data edit view
refactoring
remove 'contributions_list' helper
use some best practices
rename some variables and extract "paginated" method