Documentation of wix-embedded-mysql-download-and-extract is incorrect

[twang-apixio]

The documentation has the following useage:

java -jar wix-embedded-mysql-download-and-extract-2.2.7-SNAPSHOT-jar-with-dependencies.jar $majorVersion $minorVersion

This is incorrect. The command line requires parameter 0 to be the cache directory but will throw with a cryptic error, using the majorVersion as the cache directory, minor version as latest and the user will have to read the code to figure out what happened.

[viliusl]

fixed by #169