cmi doc
change 0.4.0-SNAPSHOT to 0.4.0
change build reference
temporarily remove part of io.
compile against jdk 1.6
SNAPSHOT
Merge pull request #108 from amplab/j6

Compile against JDK 6
show in memory or not iff is a file
change jvm version in doc
change versions to 0.4.0
[maven-release-plugin] prepare release tachyon-0.4.0
[maven-release-plugin] prepare for next development iteration
revert back
[maven-release-plugin] prepare release v0.4.0
[maven-release-plugin] prepare for next development iteration
bump version number; add hadoop version note to document.
update script and document for developers
tune document, update readme, and version for 0.4.0
minor update
[maven-release-plugin] prepare release v0.4.0