Added compression for single files to ExtractZipFile

The compress function has been added to API of ExtractZipFile, which
allows the compression of single files. It has only been tested with
.txt files.
Fixes to readme
Additions to readme

Added authors to readme. Added myself and unknown author... if you know
who the other author is please change that Tim.
Fixes to readme
Fixes to readme
readme change

Changed unknown author to anonymous
Merge pull request #283 from mkparlee/master

Added Compression to ExtractZipFile