Changelog:

• Change C function and C++ method encodeToPulseTrain() to add outoput array size parameter (backwards compatibility broken).
• Change C function and C++ method decodePulseTrain() to out a JSON object {"protocols":[]} instead of an array (backwards compatibility broken).
• Add C function and C++ method protocol_maxrawlen() to get the maximum possible number of pulses of all protocols initialized.
• Add C function and C++ method encodeToPulseTrainByName() to encode into a pulse train from a protocol name and json data.
• Disable pilight logprintf() output for non-debug builds.
• Some minor fixes and code optimizations for WebAssembly target builds (WASM-ready).