Fix readme example (#114)
Fix readme example (#114)

I fixed the readme example. The comments used hashes instead of slashes.
Furthermore, the decompressed variable was used for input to the
decompression function instead of the compressed variable.

I also added a main function and a check so that the code can be run
without any modifications.
Frommi/miniz_oxide,Frommi/miniz_oxide,Frommi/miniz_oxide,Frommi/miniz_oxide