Windows Phone 8.1 support and Static Data API updates

## Windows Phone 8.1 support + Static Data API updates

- Updated documentation to clarify locale, version, and region.
- Updated documentation to clarify that not all data is returned by default and to clarify which data is returned by default.
- Endpoint /api/lol/static-data/{region}/v1.2/versions added that returns full list of current valid version values.
- Added ranksWith field to SpellVarsDto.
- Added recMath field to BlockDto.
- Added altimages field to ChampionSpellDto and to list of tags for champData.