Rename INSTALL file to INSTALL.md, so that it renders nicely on github
Add README file
Create Pair class for use as a typed tuple return
Add server certificate parameter to TCTokenRequest

The server certificate of the TCToken provider is needed for the certificate validation specified in the eCard API
specification (TR-03112 sec. 3.4.5).
Refactor TCToken fixes
Update BC repo to include latest TLS patch
Remove double maven clean plugin entry
Correct Ausweisapp session handling compatibility

The fix had a flaw, when the server address was given without a path segment.