Plugin/Config changes

- README cleaned up
- Trailing whitespaces trimmed, whitespace now tabs-only (I think).
TABS 4 LYFE.
- Plugins are now loaded according to the `plugins` key in
`config.json`. Order is respected.
- Auto-reloading can now be disabled in `config.json` with `reload:
false`. Defaults to true.
- Config `get` method now checks a `default_config` local variable if
the requested key is not found in `config.json`.
- Config `get` method has an additional arg so the user can specify
return data type checking. If the requested key doesn’t exist in
`config.json` and no default is specified, the method will return a
blank value according to type, defaulting to `None`.
- I like `backticks`.