installer: Changed the README.txt file a lot to make it more explicit about the directory structures.
installer: Changed the README.txt file a lot to make it more explicit about the directory structures.

kevinwchang/wixel-sdk,sm6xmm/wixel-xDrip,sm6xmm/wixel-xDrip,jamorham/wixel-xDrip,novagannas/wixel-xDrip,markncooper/burnerlight,pdg137/wixel-sdk,StephenBlackWasAlreadyTaken/wixel-xDrip,StephenBlackWasAlreadyTaken/wixel-xDrip,saercnap/wixel-DexDrip,Cagier/wixel-xDrip,attackcrow/wixel,raduiliescu/wixel-DexDrip,jamorham/wixel-xDrip,markncooper/burnerlight,sm6xmm/wixel-xDrip,raduiliescu/wixel-DexDrip,StephenBlackWasAlreadyTaken/wixel-xDrip,novagannas/wixel-xDrip,markncooper/burnerlight,jamorham/wixel-xDrip,attackcrow/wixel,sm6xmm/wixel-xDrip,kevinwchang/wixel-sdk,novagannas/wixel-xDrip,saercnap/wixel-DexDrip,pdg137/wixel-sdk,jamorham/wixel-xDrip,saercnap/wixel-DexDrip,attackcrow/wixel,attackcrow/wixel,Cagier/wixel-xDrip,Cagier/wixel-xDrip,kevinwchang/wixel-sdk,pdg137/wixel-sdk,raduiliescu/wixel-DexDrip