Major update (from b.rb to main_methods.rb)

I have finished working with all the important methods and now only file remaining to code is commands.rb which I'll be working on soon enough. 

What's new?
locate rootShell if shell does not find it
search in 5 directories or just search in a directory
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few tweaks
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Checks if shell is running as admin when shell starts
(Used to check this only when choice was to install rootShell)

Warning: I coded this for 4-5 hours straight so I'm feeling lazy to do a full-range bug test on this, only minor bugs were tested for.

:)