Merge pull request #21 from lgleasain/master

Adding support for command line pass generation and building
#22 Check if formatVersion is a numeric or raise an error
get authentication for device register and delete request!
include parameters of Query string (passesUpdatedSince.. etc)
update README.md
Merge pull request #24 from ronakjangir47/passesUpdatedSince-Qstring

include parameters of Query string (passesUpdatedSince.. etc)  Thank you.  This was a feature miss on our part.
Revert "include parameters of Query string (passesUpdatedSince.. etc)"

This reverts commit 5e4db554826cb9b49add2c9d7b66a8b97ee885e1.
include parameters of Query string (passesUpdatedSince.. etc)
more descriptive variable name
more effective code to get AuthToken
Merge pull request #23 from ronakjangir47/auth-token

Authentication using ApplePass authorisation headers
updated for rubyzip 1.0.0
Merge pull request #28 from mreinsch/rubyzip-update

updated for rubyzip 1.0.0