LwPRINTF - Lightweight stdio manager

LwPRINTF Lightweight, platform independent generic standard output implementation, written in C language and optimized for embedded systems

Platform independent implementation of standard output functions (printf, sprintf, snprintf, vprintf, vsnprintf), optimized for embedded systems.

Written in ANSI C99, compatible with ``size_t`` and ``uintmax_t`` types for some specifiers
Implements output functions compatible with ``printf``, ``vprintf``, ``snprintf``, ``sprintf`` and ``vsnprintf``
Low-memory footprint, suitable for embedded systems
Reentrant access to all API functions
Requires single output function to be implemented by user for ``printf``-like API calls
With optional functions for operating systems to protect multiple threads printing to the same output stream
Allows multiple output stream functions (unlike standard ``printf`` which supports only one) to separate parts of application
Added additional specifiers vs original features
User friendly MIT license