Important changes in TasmoCompiler functionality

Breaking changes

• change the component state structure. Now network, features and
  version settings are held in separate object
• checking and unchecking "static IP" checkbox will clear the IP fields
• customization is now based on platformio_override.ini and
  user_config_override.h files
• removed selection for board version/memory layout and core version
  from last step. It is now only possible to choose Tasmota version and
  language. After choosing Tasmota version it will be compiled with core
  and memory layout which are default for chosen version and selected, in
  features step, board
• added new options in "features step". Now user can select which board
  will be used for the compilation
• added new file witch board definitions
• change available features file to include information which
  feature/feature group is for which board
• update language translation files
• add conditional display of "download compressed binary" button - it
  is not created for ESP32 boards
• update Languages.js file - replace "-" with "_" there is no need for
  that anymore
• add feature group "Light sensors" and corresponding description in
  FEATURES_DESC file
• code cleanup
  TO DO:
• more code cleanup
• validations for IP fields (IP, Gateway, Netmask, DNS)
• update README
• more tests!