Convert to utf8

# Please enter the commit message for your changes.
# (Comment lines starting with '#' will not be included)
# On branch master
# Changes to be committed:
#   (use "git reset HEAD^1 <file>..." to unstage)
#
#	modified:   pychart.html
#
# Untracked files:
#   (use "git add <file>..." to include in what will be committed)
#
#	import.pl
#	pinyin.html
#	pinyin_files/