Set locale to en_US.UTF-8 only

Too many remote servers don't have en_GB.UTF-8 which leads to annoying
error messages. Setting locale to en_US.UTF-8 as workaround.

man locale says LANG is a substitute for LC_* and LC_ALL overrides LC_*,
I'm guessing that setting LC_ALL should be enough. As for LC_COLLATE I
don't even remember why I set it to C, so let's just use en_US.UTF-8 for
that too until there is a reason to change.
Remove .rspec

Don't need it anymore since our rspec output became sane.
Add workaround to fix tmux's launch problem

https://superuser.com/questions/831028/lsopenurlswithrole-failes-with-error-10810-on-yosemite-from-within-tmux/833791#833791
Adapt to Redbet environment
Add shorthand for creating a deploy request
Tidy and improve deploy request shorthand
Add test_sparkle script

Runs all tests on all brands, outputs result to text files.
Improve deploy script

- Ask whether special or not
- Write branch name in message body
- Improve structure of message body
Check for commits without refs

If gnoref is available, use it to check if there are commits without
proper refs and refuse deploy request if so.
Remove unsafe characters from deployrequest mailto
Add shortstat to deployrequest mail
Use origin/master in place of local master

Let's use origin/master in case local master is not updated.
Turn deployrequest function into separate script
Use new mail address for Bonnier git config
Use new Redmine url for deploy mails
Use new IT-support mail address for deploy mails