restored underfs for tfs
TACHYON-92 Remove unnecessary list of files in Startup-Tasks-for-New-Contributors
Merge pull request #380 from hsaputra/remove_list_files_from_doc

TACHYON-92 Remove unnecessary list of files in Startup-Tasks-for-New-Contributors page
Merge pull request #379 from dcapwell/restore-underfs

restored underfs for tfs
removed the mutable variable in favor of a function
Merge pull request #377 from dcapwell/remove-user-hdfs

removed the mutable variable in favor of a function