ref(builder): replace python with bash

Debugging the builder script when it fails is really difficult in
python. You have to import a bunch of libraries, pipe stderr on some
commands to stdout, inspect the return codes and the error returned...
In short, it's quite difficult to debug. Refactoring to bash allows us
to debug the script quite easily by setting the -x option for bash
scripts and we have instant debugging.

This refactor also removes the "remote:" prefix from most of the
output, which is another huge plus.
style(builder): styling nitpicks
fix(builder): exit if response is bad
fix(builder): suppress stderr

We don't need to know that parsing the object failed, as we're going
to print the controller response shortly after. These errors do not
provide anything useful. It's the controller response that we're
interested in.
fix(router): update to confd 0.5.x branch to fix sort issue
fix(builder): pipe envvars to temp file
fix(builder): do not add build option if empty
fix(deisctl): fix global unit display
Merge pull request #2033 from gabrtv/fix-router-signals

fix(router): update to confd 0.5.x branch to fix sort issue
fix(router): Use official javascript content type

application/x-javascript is obsolete and shouldn't be used. http://stackoverflow.com/a/9664327
fix(builder): compiled slug is no longer a tarball
feat(router): Improved router defaults

Use recommended values from
https://github.com/h5bp/server-configs-nginx/blob/master/nginx.conf
fix(tests): Increased test timeout for smoke tests

For some heroku buildpacks the initial setup is really slow.
Merge pull request #2039 from gabrtv/fix-list-units

fix(deisctl): fix global unit display
Merge pull request #2043 from johanneswuerbach/patch-7

fix(tests): Increased test timeout for smoke tests
Merge pull request #2040 from johanneswuerbach/patch-6

fix(router): Use official javascript content type
fix(deisctl): refresh-units uses $HOME/.deis/units by default
docs(deisctl): remove sudo from deisctl installer examples
chore(*): bump CoreOS to 459.0.0
fix(contrib/ec2): fix HVM AMIs for CoreOS 459.0.0