Shortened list of changes:
- Added room aliases
- Switched the -C and -c flags
- Added the MATRIXSEND_CONFIG environment variable
- Changed config format to Lua over custom /bin/sh
- Upgraded to Matrix spec 1.5 over whatever
version it was previously using
- Removed JSON printing (and in turn, pretty printing)
- Added actual Matrix error reporting rather than
just feeding the JSON to the user
- Switched to luaposix getopt() over /bin/sh getopts
- Some more changes...
