Merge pull request #55 from timlinux/develop

Custom markers and favicon
Merge pull request #56 from timlinux/develop

Added icon on navbar
Update about.html
Update about.html
Update about.html
Add Specifiction model and migrations
Update forms, models and tests for Specification
Add required specification field to the forms
Relate Value and Specification, remove attribute
Temporary remove 'Add a new locality' button
Update about.html
Update about.html
Update about.html
Update about.html
Update about.html
Update about.html
Update about.html
Update about.html
Update about.html
Symlink REQUIREMENTS.txt in docker-prod folder