Fix encoding of comments.

This makes some files use utf-8 and fixes a weird quote in another comment.
Update gitignore to catch more cmake cruft.
Fix Mac build w/o freetype.
Merge pull request #245 from jorgenpt/mac-no-freetype-fix

Fix Mac build w/o freetype.
Fix typo in changelog.txt

Write dependent a hundred times ;)

(Would not have found it without pedantic lintian output so ;) )
Merge pull request #214 from ckorn/patch-1