[backend] bring back the BUILD_UNCHANGED event for api build status tracking, but do not deliver it to hermes.
[webui] reduce usage of WebuiRequest model
[api] do not even send UNCHANGED to backend to ignore it there
[api] remove mutex from activexml - the whole app is not threadsafe
[api] fix thread dead locks for real
[api] Add ppc64le architecture

This commit adds PowerPC64 Little Endian architecture

Signed-off-by: Dinar Valeev <dvaleev@suse.com>
[api] relax the suse repo publish test a bit, test only the important stuff
[backend] Cleanup of Debian Release file

This makes the Release file more compliant to what the Debian documentation
describes, e.g. it no longer requires a regex to pin the repoid.
[api] remove one more threadsafe measure that's hurting us
[webui] import tooltip css after talking with Henne
[webui] move the "add review" link out of the decision box

The permissions of accept/revoke are independent of reviews
[webui] switch capybara driver to poltergeist

This is the net result of 8 months watching capybara-webkit#494 not getting
fixed
[webui] port attributes to use API models
[api] allow multiple definitions for one package in a channel
[api] fix channel creation for channels with defined release targets
[dist] add cp437 kernel module to appliance initrd for vfat
[webui] avoid visiting / for every login in a test

and other tweaks for the webui test suite - merging all test suites into
one travis job
[api] test and fix release_request creation for channel packages
[api] support channel specific update info templates
[webui] work on the easy targets for incidents table