hgignore: Ignore generated webcomponents

packaging: Link bower packages

dependencies: Update bower packages It can already be built via the following command: nix-build default.nix -A bowerComponents

manifest: added 502.html into package data.

ux: make static 502 page for gateway error look better, fixes #4202

nix: Add backwardsCompatibleFetchgit Needed so that we can use fetchgit with the branch nixos-16.03 as well as current nixpkgs-unstable. It restores the behavior of nixos-16.03 which is technically wrong since it removes all .git files. Practically this issue has no big impact, so that we can keep it easily a few months this way until we don't depend on building against nixos-16.03 anymore.

rhodecode-toggle: stub for new UI element

polymer: slim out the styles and change the flow of initialization to avoid race conditions

ux: change confirm password widget to have spacing between the fields to match rest of ui, fixes: #4200

styles: build shared styles with vulcanize instead of grunt magic