Unescaped left brace in regex is deprecated - so escape it!

Perl 5.21 started warning about qr/{/, m/{/, etc.

Fix is simply to escape the "{" character with a backslash. No problem!
Mark metadata tests in 06-countries.t as TODO

... because BR metadata for October 2014 didn't get generated properly
and the guys at Nestoria (ie. me!) haven't fixed it yet :-(
Updated Changes and dist.ini for version 1.22.5