update global doc.
Docs Fixes

Mostly basic revisions. Made the "Running Tachyon on a Cluster" section
a more descriptive tutorial on how to do it with spark-ec2.
Add markdown document file for web interface.
Change the title of webInterface.md.
HY's Comments
Merge pull request #112 from manugoyal/docs_revision

Docs Fixes
Merge pull request #114 from grayluck/master

Add markdown document file for web interface.
various doc adjustment
Fix the JIRA ISSUE 'TACHYON-66':TFS and TFsShell do not respect Fault Tolerant mode
delete the temp commented functions
Merge pull request #113 from RongGu/master

Fix the issue #109 on github(Namely, the TACHYON-66 on JIRA): TFS and TFShell doesn't respect fault tollerant mode with zookeeper
make Tachyon.get() handle full path.
fix the list() inconsistency in two underfs
improve client library comment
Format all workers
Modified Unit Test RemoteBlockInStreamTest.java:readTest4() to expose bug in reading characters in the range 128-255
Added fix for RemoteBlockInStream.java:read()
Merge pull request #116 from anuragkh/master

Fix to RemoteBlockInStream.java:read()
improve instream related unit tests
add link to master branch document