Merge pull request #16 from calvinjia/master

Logging fixes, mac support, UI fixes
change default port
Merge branch 'master' of github.com:amplab/tachyon
format the code.
format works for underfs single local mode.
1.different write ahead log locations. 2.fix mvn version warning. 3. format the code.
writeaheadlog; do not show file larger than 10MB for now.
Add unit tests for TFileInputStreamTest and TFileOutputStreamTest
more unit tests. add read_no_cache.
Unit tests for InodeFile, InodeFolder, InodeRawTable, MasterInfo