[Pharo-dev] Take care with Package renaming in Pharo 3/4

Take care when renaming a package in Pharo: when you rename by just changing upper/lower case the package and code vanishes away. https://pharo.fogbugz.com/f/cases/14310/Renaming-a-package-just-by-changing-... This is in Pharo 4.0 (up to 40324) and 3.0 (up to 30858). Nice way to get rid of fresh written code, even change sorter, changes file or recover lost changes will not help anymore :(