Merge pull request #19 from jcnelson/master

Merge tracing framework
Removed auto-generated configuration files which are unnecessary
Fixed indentation space (3->4)
Update README.md
Separate Preload and LazyUpload features
LazyUpload will not use write-on-close. Instead, it uses write on flush
bugfix : reopening iRODS file caused file descriptor index changed but could not be updated to fuse_file_info at write function.
bugfix: file appending mode didn't correctly work when file open flag is the same as user given flag
Removed TEST code for simulating no local space error
Remove temporary buffer file after commit
Refactor some functions to use iRODSPath, not bare path
Update README.md