Update .travis.yml

Allow external
Merge branch 'release/2.0.0-stable'
Force ubuntu 14.04 hotfix
added filter
INSTALLED_APPS instead of PLUGGABLE_APPS
`ralph_assets` insted of `assets`
used HTTP403 template in ralph_permission util - in prog. ..
Merge pull request #1012 from ar4s/feature/search-filter-without-linked-assets

Added new filter to sidebar search
(fix) http_family for Juniper switches is now recognized properly.
Fixed broken docker autobuild for chfn
Bugfix from develop for docker building
Merge pull request #1013 from xor-xor/ralph_1808

(fix) http_family for Juniper switches is now recognized properly.
Small fix for the 'DNS Records' form.
Merge pull request #1016 from xor-xor/dns_edit

Small fix for the 'DNS Records' form ('filter' instead of 'get').
Added missing links to admin's jquery.
Merge branch 'develop' into common-403
fixed missing request bug
flake8 ready
Merge pull request #1020 from xliiv/common-403

common 403
changed ralph_permission to use request from args