Change output of log test to target/ instead of tmp/
Single Node Zab implementation.
Merge pull request #29 from EasonLiao/notempfile

Don't put test-related files under /tmp
Merge pull request #12 from EasonLiao/master

Implement a single node Zab
Add a method to create a data directory.

Add a method to create a data directory that is unique to the calling
method (target/data/$classname/$methodname). Delete target/data from
maven before running the unit test.