Update 2: Cornerstone Of Prestige

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Update 2: Cornerstone Of Prestige 
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-> Chances to generate a golden brick when a regular brick is built  
-> Retiring now open the prestige menu 
-> Use golden bricks as a currency for permanent upgrades before resetting 
-> For now, only left branch of prestige is added  

Save: 
-> System of export/import added 
-> Version control to carry save from earlier versions  

Bugfix: 
-> Option and Help menu no longer overlap  
-> It's not helpful to display cost of worker over 1e10  
-> Music was cursed when erasing the game