Silence

- Set the default address for the webserver to `127.0.0.1` instead of `0.0.0.0`
- Removed the default `SECRET_KEY`, it is now always required to provide one

- Updated README
- Fixed 500 errors when simplejson was installed alongside Silence
- Fixed SQL params not always being filled correctly in GET requests if more than one param is used

- Added a check for new Silence versions when using `silence run`, and a `CHECK_FOR_UPDATES` configuration parameter to opt out of this check
- Add support for storing the endpoint files in a folder named `endpoints/` instead of `api/`. The support for an `api/` folder will be dropped in the future.
- Display a warning message if endpoints are found in the `api/` folder instead of `endpoints/`

- Fixed encoding errors that resulted in 500 errors
- The endpoint loader now doesn't try to load non-Python files, which resulted in a fatal error

- Fixed compatibility with DECIMAL columns
- Added a new `-v`/`--version` command

Changelog:
- Fixed a bug where `silence createdb` wouldn't work for certain database names