Added code which creates /etc/ram_booster.conf

/etc/ram_booster.conf will hold global variables that can be used
by rupdate, rchroot, and by the main script when it needs to figure
out what $DEST is when run with the '--uninstall' arg
Started on Uninstall function
Removed code that checks /etc/ram_booster.conf in the uninstall function

I realized that $DEST is already set when the uninstall function runs,
so we don't need to read /etc/ram_booster.conf to find out what it is