add SIRS sample tree example
Merge branch 'master' of https://github.com/tgvaughan/MASTER
Merge remote-tracking branch 'origin/master'
Merge remote-tracking branch 'origin/master'
Merge remote-tracking branch 'origin/master'
Merge remote-tracking branch 'origin/master'
Merge remote-tracking branch 'origin/master'
Merge remote-tracking branch 'origin/master'
Merge branch 'master' of https://github.com/tgvaughan/MASTER
Merge branch 'master' of https://github.com/tgvaughan/MASTER
Merge remote-tracking branch 'origin/master'
Merge remote-tracking branch 'origin/master'
Merge remote-tracking branch 'origin/master'
Merge remote-tracking branch 'origin/master'