Transform "--" to "-{}-" in Tex files.

We want moves like "R--" and "D--" to be displayed as is, and not hyphened by Latex.
Documents the LaTeX hyphen "hack".
Changed fonts used for CJK in Latex/Xelatex build.

The fonts used are now "UnBatang" and "AR PL UMing CN".
Added fonts used to the repository.

Added the fonts + updated the readme accordingly.
Links for historical diffs.
Merge pull request #52 from viroulep/fixing-pdf-build
Document font sources.
Merge branch 'fix-font'.