get_initials, added with retroflex options, resolve #39https://github.com/lxneng/xpinyin/pull/47 https://github.com/lxneng/xpinyin/pull/48 https://github.com/lxneng/xpinyin/pull/49
➕ add a new staticmethod which can convert pinyin to upper, lower or capitalize. https://github.com/lxneng/xpinyin/pull/28
Removed extraneous "!" being appended to non 'a' vowel replacements when show_tone_marks=True; also added simple unitest.main() for non-nose users https://github.com/lxneng/xpinyin/pull/30