rubocop: Got rid of places where I was using double colons to actually call a method instead of get a constant.
rubocop: Decided to not use the ConstantName cop.
rubocop: Handled the 'debugger' cop.
rubocop: Put dots next to the method name.
rubocop: Fixed the alignment of an if statement.
rubocop: Handled the HandleExceptions cop.  We want to violate it in one of our specs.
rubocop: Fixed a line that had the wrong indentation.
rubocop: Fixed another indentation issue, and fixed comments rubocop was complaining about, mostly by removing them.
rubocop: Changed all calls to 'collect' to 'map'.
rubocop: Allowed it to remove some empty lines but then disabled that cop.
Renamed 'device_is' and 'filename_is' to 'use_device' and 'use_file'.  The common prefix makes it more obvious that these are related, and the verb 'use' makes it less surprising that these methods do a lot of work and need to called in a particular order.
Updated the ChangeLog to put the correct date for the version 0.2.0 release.