* using Container instead ofdirect pointers list manipulation
* fixed different type of virtual methods.
* Fixed typo in conditional
* Renamed ListArray to LinkedList
* Const reference to String as method parameters to prevent additional copy and memory allocation when String passed by value
* fix 'min' redefinition
* removed #include <iterator>
begin/end methods it's enough for 'for( : )' loop
count() renamed to length()
spacing fixing
* Const reference to String as method parameters to prevent additional copy and memory allocation when String passed by value
* Fixed unused params warnings
* Prevent buffer overflow on received data
* pass to 7 char to avoid save to flash by SDK
* return _contentLength, avoid array reparse to know len
* Added FlashStringHelper for text and binary
* Added FlashStringHelper also to AsyncWebSocketClient
* Added PROGMEM doc
* Corrected binary was sending PSTR as text, addded len
* Server calls client method and code as asked @me-no-dev
* server calls client method and code as asked by @me-no-dev
* Changed Code presentation
* Added printf_P methods
* Prevent buffer overflow on received data
* pass to 7 char to avoid save to flash by SDK
* return _contentLength, avoid array reparse to know len
* Added FlashStringHelper for text and binary
* Added FlashStringHelper also to AsyncWebSocketClient
* Added PROGMEM doc
* Corrected binary was sending PSTR as text, addded len
* Server calls client method and code as asked @me-no-dev
* server calls client method and code as asked by @me-no-dev
* Changed Code presentation
