add documentation for depCheck function
Re-order code, change if to case, doc depCheck
Improve documentation, expand notify function
Improve documentation
add dependency check function, rm unneeded pause
move check for lsusb to depCheck function
add normalDisplay function, change if to case
General improvements (see extended)

Reorganize code for readability/logic, remove extraneous variable when
calling notify, move dependency check to depCheck function.