Use this command without an argument to list all available upgrades.  
Use with an argument to purchase upgrades.  See [1;37mhelp properties[2;37;0m and 
[1;37mhelp upgrades list[2;37;0m for more details. 

Syntax:
[1;37mupgrades
[1;37mupgrades [1;30m<upgrade to purchase>[2;37;0m

Examples:
upgrades
upgrades color-code converter

[1;30mSee also: properties, upgrades_list[2;37;0m
