Add fixed bitmap glyph statistic

others:
1. Change no glyph output more clear

2. shorten step_y since metrics height is 24(>16)
Matrix/pixel(5009 glyphs) dump

1. change big5->ucs4 table to be const

2. add write matrix and pixel dump, the matrix is from 0x40
Add utf8 in addition to big5-u+xx