fix wp lines jump when hover over grouping
add rake tasks for mysql db backups/restores
postgresql db backups
add specs for backup task
whitespace fixes and other minor things
only sanitize_filename the actual filename
do not use the PGPASSFILE if no password is provided
db backup filename depends on db adapter
pg_dump needs the database name as the last param
Test response for forbidden WP attributes
Check update attribute constraints
Test work package update for valid attributes
WP update implementation
Test that API throws validation error
Set writeable WP attributes
Prevent double loading of API helpers
Test API V3 error response in regard to the specification
Implement API V3 error handling according to the specs
Refactor tests of API V3's anonymous user behavior
Use representer to render errors