Update change log for 1.4.0.
Update change log for 1.4.0.

CJstar/DiskLruCache,Artyomcool/DiskLruCache,lisb/DiskLruCache,JakeWharton/DiskLruCache,yadihaoku/DiskLruCache,pluto8172/DiskLruCache,CJstar/DiskLruCache,zhaokidd/DiskLruCache,sitexa/DiskLruCache,yadihaoku/DiskLruCache,zhaokidd/DiskLruCache,wangkr/DiskLruCache,tianyong2/DiskLruCache,Artyomcool/DiskLruCache,sjudd/DiskLruCache,sitexa/DiskLruCache,hzy87email/DiskLruCache,yeqiling/DiskLruCache,hzy87email/DiskLruCache,dsriram/DiskLruCache,zourb/DiskLruCache,elliottsj/ftw-android,zourb/DiskLruCache,tianyong2/DiskLruCache,JakeWharton/DiskLruCache,hotlover/DiskLruCache,gushedaoren/DiskLruCache,zmywly8866/DiskLruCache,gushedaoren/DiskLruCache,wangkr/DiskLruCache,yeqiling/DiskLruCache,hotlover/DiskLruCache,zmywly8866/DiskLruCache,pluto8172/DiskLruCache,lisb/DiskLruCache,dsriram/DiskLruCache