Merge pull request #47 from neavo/master

update README.md for maven
IDanmakuView: add removeAllDanmakus() and removeAllLiveDanmakus()
DrawHandler: automatically remove live-danmakus
DrawTask: optimize removeAllLiveDanmakus()
Danmakus: lazy iterator
Update links of sample apps
DrawHandler: optimize
v0.1.8
Merge pull request #1 from ctiao/master

sync