Updated README.md (added installation steps for MongoDB on Mac)
Updated README.md (added installation steps for MongoDB on Mac)

01walid/dzlibs,benyassine/dzlibs,Reddine/dzlibs,breda/dzlibs,abougouffa/dzlibs,benyassine/dzlibs,Reddine/dzlibs,01walid/dzlibs,abougouffa/dzlibs,Taybo/dzlibs,breda/dzlibs,Taybo/dzlibs,benyassine/dzlibs,breda/dzlibs,01walid/dzlibs,Taybo/dzlibs,benyassine/dzlibs,abougouffa/dzlibs,Reddine/dzlibs