mark count method const
pass a void* ctx into the callback function so we can hang a member function as the reader
pass a void* ctx into the callback function so we can hang a member function as the reader
* Add a dumb argument handler:

$ hextest BOUNDARY serpent_mound.las
$ hextest PATH serpent_mound.las
$ hextest HEX serpent_mound.las

* Move LAS handling code into its own class and take advantage of
* passing in void* to reader callback mechanism.