Merge pull request #30 from Madimo/master

Fix: Message window hide too fast when change song continually
post the lyrics to server in order to analize a better lyrics solution in future
post the search result to server in order to analyze a better lyrics solution in future
will this become a better performance in retina display
new function: two-line desktop lyrics
a better two-line display effect
update software version
change menu "About DynamicLyrics" to system default
disable menubar lyrics when first launch dynamiclyrics
new function: prefs for two rows lyrics
update Chinese donation details
ask for donation again since i have no money to renew my domain and vps... QuQ
update software icon
add donate menu
shortcut support
update status bar icon, fix #31
fix unable to capture window picture when desktop lyrics is running, fix #19
some code clean
hotkey for "write lyrics to iTunes"