Fixes of version 0.1
Signature: Added SignatureSha256WithEcdsa.

Change-Id: I73a0bdf6b6d966634daa6f121b65175fc82e6fd5
Refs: #1650
changes: Add 'Changes' section to track changes since previous versions of the spec

This commit also includes updated HTML CSS.

Change-Id: I0f45e3fba25587f97cbb63332d457baacb515f40
signature: Rename KeyLocatorDigest into KeyDigest

Change-Id: Ide8cace988e95269ec057786fc80db8036984c7f
signature: Defining KeyLocator as an optional field in generic SignatureInfo

Change-Id: I2e2850bdf5b1795c07aea208fe8c80c8b6df509f
Small fixes and clarifications

Change-Id: Ieb5669d21b9bb53c4c749271f25792e394130b26
name: disallow empty NameComponent in canonical order section

This commit does not change the meaning of the spec.
It makes the informative part of the spec consistent with the nominative part.

refs #1763

Change-Id: Ibe623d03932516f8ebcaa7e7381288cf7d9edc6a
name: permit zero-length NameComponent

refs #1932

Change-Id: I788e4492ad09f13a5fec791d03293aa86b152189
Introducing explicit type for implicit digest component

Change-Id: Ib2cd9a986a6b8835b0217c10aba62dbb30fc8bbc
Refs: #2011
name: Correct error in implicit digest definition

Change-Id: I57b13282335b780f079ecdba16f4f6f4ec3aaca7
Refs: #2011