add ruby 2.0.0 branch.
add 2.0.0.
add n option for a regexp which contains \xff.
use ps -ax instead of ps -A on MirOS BSD.
show debian architecture.
show uname results more preciously.
show more uname results.
invoke git clone again if clone URL is changed.
remove debut print.
use nurse's version of rubyspec.

git://github.com/rubyspec/mspec.git -> git://github.com/nurse/mspec.git
git://github.com/rubyspec/rubyspec.git -> git://github.com/nurse/rubyspec.git

This change is a result of the developers meeting on 2013-02-23:
http://bugs.ruby-lang.org/projects/ruby/wiki/DevelopersMeeting20130223Japan
discard error messages of uname.
don't limit resouce if limit option is nil.
increase default addres space limit to 150M for NetBSD.

cat /proc/cpuinfo needs over 100M memory on NetBSD.
comment out 1.8.
use tool/runruby.rb to show version before install.
Limit gdb's backtrace to 1000 lines
Merge pull request #1 from nurse/limit-gdb-bt-1000

Limit gdb's backtrace to 1000 lines
invoke ./ruby -v if tool/runruby.rb is not available.
remove trailing spaces.
remove trailing spaces.