FindYamlCpp.cmake: check the availability of the new 0.5 API.
preset_vocabulary: load essay.txt

Conflicts:
	src/dict/db.cc
	src/dict/preset_vocabulary.cc
punctuator: no conversion when 'ascii_punct' option is on.
Merge commit 'b50fc' into msvc10
Merge branch 'develop' (early part) into msvc10
Merge branch 'develop' into msvc10