add support for providing config

[rubiin]

I don't see an option to specify a config file. It would help people if there was some command to specify the typeorm config file like -c /path-to-config

[therealedsheenan]

You can specify the config something like: typeorm schema:sync --config=<PATH_TO_CONFIG>/config.js

[williamdclt]

I'll close this as #148 is a duplicate with more details.