added llib_arc (archiving, CRC,..)
llib_arc: rewrote base64
llib_arc: added ZPAQ compressor/decompresser
llib_arc: added LZ77 in llib_zpaq
added llib_cpp: C++ interface to llib (minimal for now)
EAGAIN fix in llib_md_file and llib_file_read
llib_arc: added ZPAQ stream
add sources from 'Joe 3.7' editor renamed to 'led' in src/led
adding led..
some adds in led/llib_tty/llib_sys
adding led..
led: changed keyboard map and added help