1. use google formatter; 2. basic format of all files.
temporarily remove preamble of all files.
Merge pull request #378 from zhaozhang/master

temporarily remove preamble of all files.
minor format tweak
Merge branch 'master' of github.com:amplab/tachyon
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