updated bundler to 1.5 as it is required for support of ruby platform 2.1
render prettier errors when trying to add a member without roles/principals
fixes work package status translations
Changelog
let's try ruby 2.1
well try 2.1.0 then
Update Bundler on travis for ruby 2.1
Revert "Update Bundler on travis for ruby 2.1"

apparently we don't need that anymore
fixes segfaults caused by stubbing
lessen test ramp-up
bug: featuresteps: custom field set,wp field check
timelines: custom field filters.

for now only for list and boolean custom fields.
intendation changed.
pass timelines_id for local custom fields filter.
integrative timelines custom field filter tests.

also adds these steps:
- the custom field <name> is enabled for the project <name>
- when i filter for work packages with the boolean custom field <name> set to <value>
- when i filter for work packages with the list custom field <name> set to <value>
Merge remote-tracking branch 'origin/dev' into feature/timelines_filter_custom_fields_3701
changelog.
use only custom fields for this project.
use the correct name of permission to edit work package notes
enable quoting after editing a note