Added README

README.md

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+#printm - a modular micro printf replacement for 65C02
+
+Here is a *modular* _micro_ replacement: printm()
+
+* Literals have the high byte set (APPLE text)
+* Meta characters have the high bit cleared (ASCII)
+
+    $ Hex - print 2 Byte
+    x Hex - print 4 Byte
+
+    @ Ptr - print hex byte at 16-bit pointer
+    & Ptr - print hex word at 16-bit pointer
+
+    # Dec - Print 1 Byte in decimal (max 2 digits)
+    d Dec - Print 2 Byte in decimal (max 3 digits)
+    u Dec - Print 2 Byte in decimal (max 5 digits)
+    b Dec - Print signed byte in decimal
+
+    % Bin - Print 8 bits
+    ? Bin - Print 8 bits but 1's in inverse
+
+    o Oct - Print 1 Byte in octal (max 3 digits)
+    O Oct - Print 2 Byte in octal (max 6 digits)
+
+    a Str - APPLE text (high bit set), last char is ASCII
+    s Str - C string, zero terminated
+    p Str - Pascal string, first character is string length
+
+Each option can individually be enabled / disabled
+to control the memory footprint since you probably
+don't need "every" feature.  Seriously, when was the last time
+you _needed_ octal? :-)
+
+printm() has manually been optimized for size. In gcc parlance, `-Os`.
+With everything enabled printm() takes up less then 512 bytes.
+
+See the latest code for the exact byte usage!
+
+Michael Pohoreski
+Copyleft {c} Feb, 2016
+Special Thanks: Sheldon for his 65C02 printf() source, qkumba optimizations
+