Add a howto document on freezing a CT log. (#1045)
Add a howto document on freezing a CT log. (#1045)

* Started drafting.

* Finish off the process.

* Make v1.0.8 the required version.

* Review fixes

* Add note that this is an example for CT.

AlCutter/trillian,Martin2112/trillian,daviddrysdale/trillian,google/trillian,google/trillian,Martin2112/trillian,Martin2112/trillian,gdbelvin/trillian,daviddrysdale/trillian,AlCutter/trillian,RJPercival/trillian,daviddrysdale/trillian,gdbelvin/trillian,RJPercival/trillian,gdbelvin/trillian