Add description of Verifiable Logged Map to readme (#31)
Add description of Verifiable Logged Map to readme (#31)

Content is ported almost unmodified from the PDF.
gdbelvin/trillian,daviddrysdale/trillian,Martin2112/trillian,daviddrysdale/trillian,Martin2112/trillian,gtank/trillian,google/trillian,codingllama/trillian,AlCutter/trillian,gtank/trillian,codingllama/trillian,google/trillian,gdbelvin/trillian,Martin2112/trillian,gdbelvin/trillian,RJPercival/trillian,AlCutter/trillian,RJPercival/trillian,daviddrysdale/trillian