Added Project Manager editing and permissions
Converted Trial listing in Target to table with CSS styling
Fixed Group view permissions for Guest login
Permission fixes for Target and Group_membership
Clarified that time is in GMT in Trial table for Target
Added table display for Group and User show pages
Fixed Project Manager text for target show page
Removed Admin from being able to add Targets to Groups that it doesn't own
Updated documentation in README.md
CSS improvements for link buttons and user selector