Merge pull request #24 from calvinjia/master

Log file fix, MasterLogReader fix, test cases
bump version number in tachyon-config.sh
[maven-release-plugin] prepare release v0.2.1
[maven-release-plugin] prepare for next development iteration
bump the version for next development iteration
Update README.md
Added deb profile for generating Debian packages.
Added deb control file
update JIRA url.
Update README.md
Merge pull request #26 from markhamstra/DebPackaging

Deb packaging
Make UserInfo more efficient, plus more tests.
Merge branch 'master' of github.com:amplab/tachyon
remove jdk requirement in deb packaing.
dep on hadoop-client only.
separate worker's rpc handler and storage server.
Separate worker info usage for master and workers.
Improve worker storage related.
fix tests.
active remove.