update version number

Merge pull request #3 from tjedrowald/master

Make 'get_url' functions compatible with IOS

new version

added some doc for the for_time parameter

enhance fixed time TOTP generation&verification

Allow the date/time to be specified when generating or verifying

update doc to reflect change in used libraries

added counter storage and serialization to TOTP object in order to reach

use luaossl instead of luacrypto

use luaossl instead of luacrypto

use luaossl instead of luacrypto (later is unmaintained)

corrected invalid rockspec

verified compatibility with later lua versions

used default naming scheme of busted for test scripts