Update change log and bump version

Remove old docs (replaced by README)

Fix typos

Merge pull request #22 from kaylanm/tktauthdigest_fix

Fix TKTAuthDigest algorithm selection.

Merge pull request #20 from tomalok/tktauthdigest_directive

Added TKTAuthDigest directive, updated docs & exmples.

Update mod_auth_pubtkt.spec

Tag version 0.8

Tag version 0.7.