Do not force config path to be relative to binary location

[Roguelazer]

If I invoke aurora as follows:

/path/to/bin/aurora -c /etc/aurora.toml

I expect it to read the config from /etc/aurora.toml; however, it instead tries to read from /path/to/bin/etc/aurora.toml (that is to say, it always interprets the config path to be relative to the directory the executable is in).

[xuri]

@Roguelazer Thanks for your issue. I have fix this bug and make a new release, please upgrade to the last version.