currently, this is configurable only via instance vars. i'm going to reorganize startup, to create the modem, then initialize it, to give the creator a chance to set these vars (via accessors) before the fun begins.
i realized that having multiple mock modems just meant that i had to run the (teeny tiny) test suite against each one. instead, i'll try to make the single GSM::Mock::Modem easier to subclass and test with.
Conflicts: lib/rubygsm/core.rb rubygsm.gemspec
both be logged with the same code. quack!
overwriting old logs, which turn out to be important)
…and delete functionality in the receive thread