Improved docs and formatting for RemoteBlockInStream and TachyonFile
remove unused import statement in jsp
update docs
Merge pull request #557 from luogankun/luogankun04

[Docs]update docs
Merge pull request #556 from luogankun/luogankun03

Remove unused import statement in jsp
return false after exsits check failed
switched to directoryMode to make sure bin has the right perms
added file mode back
Merge pull request #561 from dcapwell/bintar

switched to directoryMode to make sure bin has the right perms
Merge pull request #560 from luogankun/luogankun05

return false after exists check failed
Update doc for new CLI commands
Merge pull request #562 from Huawei-Tachyon/jira74a

Update doc for new CLI commands
Merge pull request #558 from manugoyal/remote-read-docs

Improved docs and formatting for RemoteBlockInStream and TachyonFile
format
made master retry count configurable.
Merge pull request #565 from dcapwell/masterRetryConfig

made master retry count configurable.
handle overflow when retry count gets larger
lower retry to 29
Merge pull request #566 from dcapwell/retryWithLargerValues

handle overflow when retry count gets larger