Remove warnings from build. (#66)
Remove warnings from build. (#66)

* Suppress annotation processor wanings. (Ignore のし方がかっこ悪い。。。 RFC)
* Remove internal class use flag. see http://stackoverflow.com/questions/4065401/using-internal-sun-classes-with-javac
* Add `warnings as error` flat except local build. RFC
line/line-bot-sdk-java,KevinYobeth/XIIpaokBOT,And-C/Line-chatbot-for-COMP3111,xinmi/ASK,williamchand/linebotsdk,RinoSato/test1,okzapradhana/line-bot-sdk-java,yunagi111/yunagi,xzhangbx/Line-chatbot-for-COMP3111,ryukakusan/Kitchensink,line/line-bot-sdk-java,Jekyll-SONG/Line-chatbot-for-COMP3111,yassineamira007/line-bot-sdk-java,imamrinjani/percobaan2,puzzlethai/line,xgaoak/COMP,zysjimmy/Line-chatbot-for-COMP3111,austin0910/line-bot-java-english-only,speedk0re/kitchenstank,EijiFukawa/linebeacontest1,line/line-bot-sdk-java,kv19971/Line-chatbot-for-COMP3111,c963951/briantest,Jekyll-SONG/Line-chatbot-for-COMP3111,xyaoab/Line-chatbot-for-COMP3111,WangPrimo/LineBot,line/line-bot-sdk-java,xinmi/line-bot,locheng2016/ask,ZilvexRC/Line-chatbot-for-COMP3111,hlmaab/Line-chatbot-for-COMP3111,eyemap/LineThai,xzhangbx/Line-chatbot-for-COMP3111,MaxBai/line-bot-test-one,zysjimmy/Line-chatbot-for-COMP3111,eatnoodles/LineBotCC,PilerMakier/Line-chatbot-for-COMP3111,piersimak/Werewolf,sangatu/linebot334,infowarnet/javaline