Update eventmachine dep to 1.0.0+, 0.12.10 won't build @Debian.

[michalrus]

See eventmachine/eventmachine#345 -- this won't build using bundle install, I'm getting the same error as people in mentioned issue.

compiling rubymain.cpp
rubymain.cpp: In function ‘VALUE t_connect_server(VALUE, VALUE, VALUE)’:
rubymain.cpp:468:42: error: format not a string literal and no format arguments [-Werror=format-security]
rubymain.cpp: In function ‘VALUE t_bind_connect_server(VALUE, VALUE, VALUE, VALUE, VALUE)’:
rubymain.cpp:488:42: error: format not a string literal and no format arguments [-Werror=format-security]
cc1plus: some warnings being treated as errors
make: *** [rubymain.o] Error 1

Further research:

• on i386 it compiles all native extensions without problems, just checked. Debian stable @ amd64 is a problematic combination,
• thin and nokogiri fail, too,
• changing eventmachine, thin and nokogiri versions in Gemfile.lock to fixed ones makes bundle install complete successfully on amd64, but then barkeep doesn't quite work and uses 100% CPU.

[bryenbegg]

Been able to reproduce this as well.
This is the sole reason stopping me using barkeep in my production development teams.
64-bit is a necessity in this day and age (especially with enterprise servers).

[jonny64]

same error

uname -a
Linux 3.2.0-4-686-pae #1 SMP Debian 3.2.51-1 i686 GNU/Linux
cat /etc/debian_version
7.2