Update README with note on itemsPerPage at end.
Update README with note on itemsPerPage at end.

As highlighted in https://github.com/michaelbromley/angularUtils/issues/29
dszmaj/angularUtils,allanlb/angularUtils,alexkuttig/angularUtils,Kerruba/angularUtils,jlgrock/angularUtils,saike/angularUtils,danlobo/angularUtils,telesma/angularUtils,Git1111/angularUtils,benoror/angularUtils,yshyee/angularUtils,zzzzzyuzhang/angularUtils,allanlb/angularUtils,imakmgit/angularUtils,radhikagiri/angularUtils,michaelbromley/angularUtils,alexkuttig/angularUtils,Git1111/angularUtils,pkdevbox/angularUtils,Kerruba/angularUtils,kzganesan/angularUtils,saike/angularUtils,wesleyliu/angularUtils,humpy125/angularUtils,wesleyliu/angularUtils,kzganesan/angularUtils,tianhengzhou/angularUtils,romelgomez/angularUtils,radhikagiri/angularUtils,wpsmith/angularUtils,michaelbromley/angularUtils,zzzzzyuzhang/angularUtils,dszmaj/angularUtils,jlgrock/angularUtils,benoror/angularUtils,danlobo/angularUtils,yshyee/angularUtils,romelgomez/angularUtils,narasingh/angularUtils,imakmgit/angularUtils,phw/angularUtils,pkdevbox/angularUtils,noahxinhao/angularUtils,humpy125/angularUtils,phw/angularUtils,wpsmith/angularUtils,noahxinhao/angularUtils,narasingh/angularUtils,telesma/angularUtils,tianhengzhou/angularUtils