fix compilation on solaris with new sunww compilers (closes #416)
add licenses to gemspec

so rubygems.org can display them. 
Merge pull request #421 from pivotal-cloudplanner/patch-1

add licenses to gemspec
Fix crash on attach/detach in the same tick
Merge pull request #427 from pietern/attach-detach

Fix crash on attach/detach in the same tick
fix idle test with epoll (cc #427)
fix infinite loop in heartbeat dispatch when system time is changed (closes #428)
fix EM.stop latency when timers exist (closes #426)
fix rake-compiler hacks when cross-compile env is missing
Merge remote-tracking branch 'upstream/master'