Remove "Changes" section from README
Remove "Changes" section from README

Replaced by Github's releases feature.

OdNairy/Alpha,DaidoujiChen/FLEX,jdk89757/FLEX,xNUTs/Alpha,pxpgraphics/Alpha,Suninus/FLEX,hugo-/FLEX,Xiaobin0860/FLEX,pjebs/FLEX,msdgwzhy6/FLEX,BrianBatchelder/FLEX,hoaquo/FLEX,nikhildhamsaniya/Alpha,iBcker/FLEX,evliu/FLEX,NSExceptional/FLEX,nikhildhamsaniya/Alpha,ramoslin02/FLEX,Legoless/Alpha,Legoless/Alpha,Flipboard/FLEX,pxpgraphics/Alpha,NSExceptional/FLEX,OdNairy/Alpha,tttpeng/FLEX,otatime/FLEX,Kingside/FLEX,erichoracek/FLEX,deer-hope/FLEX,lintaoSuper/FLEX,sunfei/FLEX,fbernardo/FLEX,nikhildhamsaniya/Alpha,xNUTs/Alpha,Flipboard/FLEX,appspector/FLEX,tttpeng/FLEX-DatabaseBrowser,gank0326/FLEX,Automatic/FLEX,programming086/FLEX,zhaoguohui/FLEX,OdNairy/Alpha,pxpgraphics/Alpha,xNUTs/Alpha