Before, the tar operation would write the incorrect number of bytes to
indicate the end of the tar file. It should have been 2 blocks of 512
ascii zeros, but it would write 529 zeros instead.
The new implementation of `writeEndBlocks` is nicer and we can reuse
code with the `addEmptyBlock` function.
+ Added skeleton "Tar" operation with no functionality
+ Added intial functionality of "Untar"
+ Added a function in `Utils` `HTMLFormat` to generalize HTML generation
of files and folders (could later be used in Unzip).
I had a brief search for a small library for tar and untar operations,
however they were mostly for node (if anyone finds one we can drop in
that would be appreciated) or unmaintained. Luckily the tar spec is
relatively easy to understand just from Wikipedia.
