Add Korean characters from Baekmuk Gulim font

Add all the characters from Baekmuk Gulim font except the ones
that already exist in Shinonome. This includes all the Hangeul and
a part of Hanja (which will be useful for Traditional Chinese).

Hanja were shifted 1px to the left and 1px to the bottom to fit into
Shinonome better. Unfortunately, this may still be not enough (Shinonome
doesn’t really have a margin, often placing single dots and other
characters in the topmost line and rightmost column, while Gulim
always has these lines without any pixels), so Chinese characters
may require some editing to fit the Shinonome style.

Hanja are also useful for Traditional Chinese; however, many more
characters are needed for normal Chinese support. Currently, some
basic words (like nei5/ni3 'you') are still missing.