parsers: remove obsolete comment
[main] fix error message
[conf] use actual XDG paths for configuration directories
[doc] add skeleton for luaotfloadrc manpage
[*] add rules for building config man page to makefiles
[doc] make manpage source well-formed reStructuredText
[fontloader] sync with Context as of 2014-07-03
[fontloader] sync with Context as of 2014-07-06
[db] remove the alternative (and buggy) verbose file lookup

Also document the file lookup somewhat and rename it to
``font_file_lookup()``.
Merge pull request #224 from phi-gamma/texlive2014

fixes and syncs