Update README_pushing_to_maven.md to include more details steps
Update README_pushing_to_maven.md to include more details steps

ckurtm/TourGuide,cnevinc/TourGuide,sylsi/TourGuide,huynhchanhuy/TourGuide,horie1024/TourGuide,finally-vince/TourGuide,weikipeng/TourGuide,changjiashuai/TourGuide,shyamkumarm/TourGuide,luinnx/TourGuide,YutaKase6/TourGuide,MichiganLabs/TourGuide,wenion/TourGuide,Shedings/TourGuide,0359xiaodong/TourGuide,worker8/TourGuide,luwei2012/TourGuide,tommytcchan/TourGuide,worker8/TourGuide,wsygwg/TourGuide,MaTriXy/TourGuide,AndroidWx/TourGuide,nousmotards/TourGuide