Bump version number to 0.4.0.
Add changes document.
Fix display name of main activity.
Set correct version in android manifest.
Ignore case for pinyin input.
Improve ordering of search results for chinese search.
Improve ordering of results from reverse search.
Include word length in pinyin search result order by clause.
Sort pinyin search results alphabetically by pinyin column.
Change hanzi and pinyin searches to "starts-with".