- Added support for defining HTML components using YAML syntax.
- Added `loadtxt` and `loadraw` in the `util` module to support loading elements directly from given file path (like `loadyaml`)
- Added optional `static` argument in the file loaders as a switch to decide whether to escape all the `{` and `}` with `{{` and `}}` respectively. Default is `False`.
- Some docs improvement.