Add notice to leave password field blank to not change it
Add attributes for position (latitude and longitude) to project
Add attributes for individual tasks, requirements and material to project
Disallow access to login and register for robots
Extend user model and controller instead of overriding it completely
Extend sessions controller instead of overriding
Remove unnecessary .gitkeep files
Merge branches 'master' and 'projects' of https://github.com/matthias-g/stc-karlsruhe into projects
Show profiles of other users
Show volunteers and individual_tasks, requirements and material in project page
Add location picker.
Merge with latest pull from Matthias.