Allow failtures on 1.8.7 due to unstable jobs on travis
Version bump (0.7.0)
Refactoring, only install signal handlers once
Fix Ruby 2.0 signal handling

Use the self-pipe trick to make the signal handlers safe in Ruby 2.0
Merge remote-tracking branch 'jdelStrother/signal-handlers' into
paperless

Conflicts:
	lib/spin/version.rb
Release 0.7.1.paperless.