Rename main.c to censorscope.c
Add libevent support

Builds fine but segfaults on launch. Need to debug
Fix segfault caused by unitialized timeval pointer.
interval in minutes not seconds
Write only errors to stderr
Remove unnecessary global variable.
Add documentation.
Enforce proper stack discipline on errors.
Remove inclusion of unused header.
Split experiment_schedules_init into two functions.
Make error checking more explicit.
Remove Alex domains list.
Fix off-by-1 error
Specify experiment intervals in seconds.
Set a panic handler.
Fix DNS includes.
Don't close Lua handle on error.

Let sandbox_destroy do that.
Proper error handling when running experiments.
Expose current script name in the proper way.

SCRIPT_FILENAME didn't work, becuase it changed whenever we did a new import.
Make allocator use size_t properly.

Previously, there was the possibility of gross memory counting errors because I
didn't account of the fact that size_t is unsigned.