Entities and methods generator

[nexor]

The idea is to generate API types and methods automatically as a result of parsing HTML page located at https://core.telegram.org/bots/api

Common workflow:

1. Download webpage HTML and parse it
2. Generate dlang structs/classes/functions
3. Write generated code to corresponding .d files
4. Optionally, generate DDOC documentation and unit tests

Similiar projects https://github.com/omarmiatello/telegram-api-generator