fix #58
small fixes on frontpage
Merge branch 'stable' of github.com:it3s/mootiro-maps into stable
fixing sendmail + adding testimonial to frontpage
updating translations
contributed projects to users profile page
fixing images links on explanations mail
explanations mail with server online version
explanations mail on object creation
adding use_cases link to project explanations
Merge branch 'stable', remote-tracking branch 'it3s' into stable
Merge branch 'stable' of github.com:it3s/mootiro-maps into stable
Merge branch 'stable' into help_center