Lijia has fixed the buglet in the animation package, and only a single warning was left
move sshfs from the R script to Rakefile; in the R script I only need to check the mode of figure/ -- if it is 2755, it means I have mounted the r-forge drive
since knitr 1.1.9 I only need to use quiet=TRUE to make knitr into quiet mode (no progress bar)
indicate the current Rmd file being compiled