[Pharo-project] [update 3.0] #30118

[Marcus Denker]

30118
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10588 Prepare isHeadless for new VMs with double dash -- arguments
        https://pharo.fogbugz.com/f/cases/10588
        
10587 add #options compatibility method to old Compiler class
        https://pharo.fogbugz.com/f/cases/10587
        
10589 clean up #decompileString
        https://pharo.fogbugz.com/f/cases/10589

Diff information:
http://smalltalkhub.com/mc/Pharo/Pharo30/main/System-Support-MarcusDenker.827.diff
http://smalltalkhub.com/mc/Pharo/Pharo30/main/Compiler-MarcusDenker.451.diff