v0.10.0.
Switched to faster #push version, based on Train#fpush code.
Updated Bolgia dependency to v2.6.1
Updated Syllabus devDependency to v0.29.2.
Added simple #push #pop benchmarks.
On branch master
modified:   Readme.md
new file:   bench/libra-push-pop-bench.js
new file:   bench/run.sh
modified:   lib/libra.js
modified:   package.json
modified:   test/rollback-subscription-test.js
modified:   test/run.sh