• Added support for the new ESP8266-based boards (ESPDuino, ESP-WROOM-02, ESPresso Lite 1.0 & 2.0, SparkFun ESP8266 Thing Dev, ThaiEasyElec ESPino) to Espressif development platform
• Added board_f_flash option to Project Configuration File platformio.ini which allows to specify custom flash chip frequency for Espressif development platform (issue #501)
• Added board_flash_mode option to Project Configuration File platformio.ini which allows to specify custom flash chip mode for Espressif development platform
• Handle new environment variables PLATFORMIO_UPLOAD_PORT and [PLATFORMIO_UPLOAD_FLAGS]([issue #518])
• Fixed issue with CPPDEFINES which contain space and break PlatformIO IDE Linter (IDE issue #34)
• Fixed unable to link C++ standard library to Espressif platform build (issue #503)
• Fixed issue with pointer (char* myfunc()) while converting from *.ino to *.cpp (issue #506)