Add changelog entry for v1.2.0. (#287)
Add changelog entry for v1.2.0. (#287)

Enhancements have been made to various utilities including scanner,
sctcheck, loglist and x509util.

The allow_verification_with_non_compliant_keys flag has been removed
from signatures.go.

An implementation of Gossip has been added. See the gossip/minimal
package for more information.

An X.509 compatibility issue for Go 1.11 has been fixed. This should be
backwards compatible with 1.10.
google/certificate-transparency-go,daviddrysdale/certificate-transparency-go,google/certificate-transparency-go,daviddrysdale/certificate-transparency-go,google/certificate-transparency-go,RJPercival/certificate-transparency-go,RJPercival/certificate-transparency-go,daviddrysdale/certificate-transparency-go,RJPercival/certificate-transparency-go