v0.1.2: bugfixes

Fix bstream length calculation under alnum mode, fix issue #11

v0.1.1: export slot reader symbols for QR-SYMBOL object

Bump up version and release

with ENCODE-SYMBOL, MATRIX, MODULES and DARK-MODULE-P, it is now easy
to write another backend for QR symbol

v0.1.0

QR code encoder version 0.1.0