Bump the changelog to 5.13.1

Location of the header file changed

The structure of lg-atomese has changed

Dictionary fix

Bump changelog to version 5.12.10

Bump version number to 5.12.9

Fix build break due to changed AtomSpace API

Bump changelog to 5.12.9

iBump version number to 5.12.8

Work around compiler error.

Bump changelog past 5.12.7

Publish version 5.12.7

Fix build break due to obsolete AtomSpace usage.

Bump changelog to 5.12.7

Bump to version 5.12.6