Cleanup on code and add small Javadoc updates:
1. Update Javadoc to specify the return object in MasterClient#addCheckpoint
2. Fix code alignment
3. Remove // TODO Auto-generated method stub
4. Fix spacing in swith-cases statements in MasterInfo class
5. Fix type comment in DataServerMessage
Revert indent switch-case statements to follow code guidelines.
Remove core/src/main/java/tachyon/hadoop/HdfsFileOutputStream.java per discussion in Tachyon groups
Clean up Javadoc on TachyonURI class.
Change to use String#contains from != -1 for clarity.
Remove unnecessary Javadoc for private method.
Update Running-Spark-on-Tachyon.md

If spark is invoked from environments which can not access core-site.xml, use the SparkContext.hadoopConfiguration.set
Merge pull request #309 from iramaraju/master

Update Running-Spark-on-Tachyon.md
Remove unused exception throws
Remove unneeded return statement
Update Javadoc to remove unthrow Exception
Update Javadoc for MasterInfo#writeImage
use assembly plugin to create release tarball
remove intellij configs from tar
Revert "added todo"

This reverts commit 8b297703cc9c68cd3709e8999d9c09bc1f7b96a7.

Conflicts:

	core/src/main/java/tachyon/util/CommonUtils.java

Signed-off-by: rootfs <hchen@redhat.com>
retain TODO comment for java 6 support

Signed-off-by: rootfs <hchen@redhat.com>
Merge pull request #313 from rootfs/wip-revert-nio

Revert "added todo"
Merge branch 'master' into release-tar
remove fasterxml.jackson dependency from the client library
Merge branch 'branch-0.5'
Merge pull request #307 from hsaputra/simple_cleanup_master_code_1

Cleanup on unused code, comments, and small Javadoc updates
added readme
renamed tachyon-assembly to assembly.  user must explicitly request tar generation
Merge pull request #310 from dcapwell/release-tar

Release tar