override addString:at:encodedTo: as suggested
Merge branch 'squeak4.3_dev' into issue_82
Merge branch 'squeak4.3' into issue_82
tracing needed, since travis errors don't reproduce locally
fix potential fallout from Issue #64 fix ... MCVersionInfo created with nil date and time ... still suffereing from inability to reproduce error locally, so this is a guess
poorly formed MCVersionInfo was the last problem from Issue #64... no overrides and green builds for Squeak4.5!
Merge branch 'issue_82' into squeak4.3