CS fixes. made the svc attr customizable
updated ant build to be less platform dependent.
Ranking of the previously achieved authentication methods vs requested one. Initial commit.
Implementation of the mfa method validation/selection algorithm

For the existing SSO session with previously fulfilled mfa transactions.
This commit addresses #83
Add comment about ranking priority semantics
Typo
Refactoring based on PR review
Merge pull request #84 from Unicon/issue#83

Issue#83
Merge branch 'master' into issue#81