[Pharo-project] [update 2.0] #20080

20080 ----- - Issue 5912: [ENH]: IntegerTests for Dummies. Thanks Sean De Nigris. http://code.google.com/p/pharo/issues/detail?id=5912 - Issue 5756: Failing tests: MC loading/ unloading. First test. http://code.google.com/p/pharo/issues/detail?id=5756 - Issue 5909: [ENH]: Easy TimeZone instances. Thanks Sean De Nigris. http://code.google.com/p/pharo/issues/detail?id=5909 - Issue 5897: [ENH]: Clean SystemProgressMorph and friends. Thanks Sean De Nigris. http://code.google.com/p/pharo/issues/detail?id=5897